Conex Box for Sale: The Complete Buyer's Guide for 2026

The word "conex" gets used loosely in the container market, and that creates real confusion for buyers who are not sure whether they are shopping for the same product under a different name or something with genuinely different specifications. Add in the fact that sellers use "conex box," "shipping container," "storage container," "cargo container," and "steel box" more or less interchangeably, and it is easy to feel like you are chasing a moving target.

This guide cuts through that. If you are looking for a conex box for sale — whether for storage on a job site, a farm, a commercial property, or a conversion project — you are shopping in the same market as everyone buying shipping containers, and the same rules apply. Here is everything you need to know about sizes, condition grades, real pricing, and how to get the right unit delivered to your site.

What Is a Conex Box, and Is It Different from a Shipping Container?

The short answer: no, not in any meaningful way for a buyer in 2026. "Conex" is a name with military origins — the term was used by the U.S. Army for standardized steel cargo containers beginning in the 1950s and 1960s. Those original military conex boxes were smaller than the ISO shipping containers that became the global standard, but the name stuck in American vernacular and gradually became a generic term for any steel intermodal container.

Today, when someone searches for a "conex box for sale," they are almost universally looking for what the industry calls a standard ISO shipping container — the same 20ft and 40ft steel boxes that move freight across the ocean and then get repurposed for storage, construction use, and building projects. If a seller is offering "conex boxes," they are selling shipping containers. The specs, condition grades, and price drivers are identical.

For a deeper look at how the terminology evolved, the existing blog on conex box vs shipping container differences and the complete conex box history and uses guide cover the background in detail. This guide focuses on the buying decision itself.

Common Problems Buyers Run Into When Shopping for a Conex Box

The conex market has a few recurring pain points that catch first-time buyers off guard. Knowing these going in saves time and money:

• Vague condition descriptions: Terms like "used," "refurbished," "reconditioned," and "storage grade" mean different things to different sellers. Without a clear grading standard, a buyer can end up with a container that has more rust and structural wear than expected.
• Delivery costs quoted late: A lot of sellers advertise the container price and add delivery separately at checkout. The delivery leg is a significant cost driver — especially in markets far from major port depots — and needs to be in the total from the start.
• Wrong size for the application: Buyers often default to a 20ft unit without calculating whether a 40ft would serve them better for only a modest price increase. The cost-per-square-foot math usually favors the larger container for any serious storage need.
• No inspection at delivery: Buyers who do not know what to check when the container arrives sometimes sign off on a unit with damage they could have refused. Knowing what a proper delivery inspection looks like matters.

YES Containers addresses all of these directly: condition grades are clearly defined, pricing shown in the products catalog is the base price with delivery calculated transparently on top, and the inspection at delivery guide tells you exactly what to look for when the truck arrives.

Conex Box Sizes: What's Available and What Fits Your Use Case

In the current market, conex boxes — again, standard ISO containers — come in two primary sizes for the buyer market, with several configuration variants within each size:

20ft Conex Box

The 20ft container is approximately 20 feet long, 8 feet wide, and 8 feet 6 inches tall on the interior (standard height). It offers around 1,170 cubic feet of usable storage space — enough to store the contents of a 3 to 4 bedroom house, a significant amount of construction materials and tools, or farm equipment and supplies. It is the most manageable size for tight sites with limited access, since a tilt-bed truck can place it in spaces where a 40ft unit would not fit.

40ft Conex Box

The 40ft container doubles the footprint to approximately 2,390 cubic feet of usable space. For any serious commercial or construction application, this is the default choice — the cost per square foot of storage drops considerably compared to running two 20ft units, and the single continuous interior space is more practical for most use cases. The 40ft high cube variant adds about 12 inches of ceiling height, bringing the interior clearance to around 8 feet 10 inches, which is meaningful for taller pallet stacks, standing workspace, and equipment with vertical clearance requirements.

Configuration Variants

Beyond the base dimensions, conex boxes are available in several door and access configurations that change how you load and use the container:

All of these configurations are available at YES Containers. Browse the full range by type at the products page, where you can filter by size, condition, configuration, and depot location.

New vs. Used Conex Boxes: Understanding Condition Grades

The condition grade of a container is the most important variable in the buying decision after size. Here is what the main grades actually mean:

One-Trip (New) Conex Box

A one-trip container has made a single ocean crossing from the manufacturer — typically from China — and is sold in near-new condition. The exterior paint is fresh, the interior floor is clean and undamaged, and the structural steel shows no fatigue or pre-existing rust. This is the grade to choose for conversion projects, visible installations, home builds, retail use, or any situation where the starting condition of the container matters for the end result.

Browse available one-trip containers: new 20ft standard, new 40ft high cube, new 40ft double door high cube, new 40ft high cube side door, and new 40ft high cube open side.

Used (Cargo-Worthy) Conex Box

A used cargo-worthy container has completed multiple shipping cycles and been assessed as structurally sound and weatherproof. It will show cosmetic wear — surface rust, dents, and faded exterior paint are normal and expected — but it holds cargo and keeps out water. This is the most practical and cost-effective choice for straightforward storage applications where appearance is not the priority.

Browse used inventory: used 20ft standard, used 40ft standard, and used 40ft high cube.

For a thorough breakdown of how grades affect both the price you pay and how long the container performs over time, the blog on how container grades affect price and longevity is worth reading before you decide.

Conex Box Prices in 2026: What to Expect

Pricing in the conex market is location-driven — it reflects how close you are to an available depot, what the regional supply looks like, and which condition grade and configuration you select. The prices below reflect current live inventory at YES Containers depots across the country. All prices shown are base pickup prices; delivery is calculated separately.

Prices at the lower end of each range reflect well-supplied depot markets — Houston, Chicago, Long Beach, Newark, Charleston. Prices at the higher end reflect lower-supply regions or specialty configurations. The most accurate number for your location is always the live price shown for the nearest depot in the products catalog.

Adding Delivery to the Total

Delivery by tilt-bed truck costs approximately $500 for the first 100 miles from the depot, plus around $5 per additional mile beyond that. A buyer 150 miles from a depot adds roughly $750 to the base price. A buyer 300 miles out adds approximately $1,500. Comparing base price plus delivery across two or three nearby depot options often reveals a meaningful difference — and that exercise is easy to do with the location filter on the products page.

Standard delivery runs within 10 business days. If you need the container sooner, rush delivery in 5 to 7 days is available. Buyers who prefer to self-collect can use the pickup service and avoid the delivery charge entirely.

Where to Buy a Conex Box: What Separates Good Suppliers from Bad Ones

The container market has its share of unreliable sellers — private listings on Craigslist and Facebook Marketplace where condition is unverified, brokers who quote low and add charges later, and unlicensed dealers who cannot back up the condition claims they make. A few things to look for when evaluating any supplier:

• Transparent pricing: Base price and delivery cost should both be clear before you commit. Any supplier that will not give you a delivery quote upfront is one to be cautious about.
• Verified inventory: The container you are buying should be inspectable — either in person or through a documented inspection process. YES Containers uses a verified inspection process for every unit, covered in detail at the container inspection guide.
• Defined condition grading: A supplier who uses vague language like "good condition" without defining what that means is not giving you enough to make a confident decision. Condition should be described in terms of structural integrity, surface rust level, floor condition, and door seal function.
• Nationwide reach with local depot inventory: A supplier with a single location can only offer what is close to their yard. YES Containers operates across 40+ depot locations nationwide, which means inventory availability and competitive pricing across the full country — not just one regional market.

The guide on how to verify a shipping container seller covers the full checklist for evaluating any supplier before you hand over payment.

Conex Boxes for Sale by State and Region

YES Containers maintains depot inventory across the country, with containers available for sale and fast delivery in most major metro areas and surrounding regions. Some of the most active markets include:

• Arizona and Nevada: Phoenix, Glendale, Las Vegas — strong inventory with fast delivery to surrounding rural and suburban areas. Buyers in Tucson, Scottsdale, Henderson, and across the Southwest regularly source from these depots.
• Texas: Houston, Dallas, Austin, El Paso — among the deepest used container inventory in the country, with Houston particularly well-supplied given its port activity.
• Ohio and the Midwest: Columbus, Cleveland, Cincinnati, Chicago, Detroit, Indianapolis — multiple depot options mean buyers can often compare prices across two or three nearby locations.
• Northeast: Newark, Boston, Charlotte, Baltimore — strong new and used inventory serving the densely populated Eastern Seaboard.
• Southeast: Charleston, Savannah, Jacksonville, Tampa, Miami — port markets with reliable used container supply at competitive base prices.
• West Coast: Long Beach, Oakland, Chatsworth, Portland, Tacoma, Seattle — major port cities with strong new container supply given direct import flows.

Filter the full inventory by your nearest city or state at yescontainers.com/products to see exactly what is available and at what price near you right now.

Payment Options and Offers Worth Knowing About

YES Containers offers several purchasing arrangements that matter for different buyer situations:

• Pay on delivery (POD) — payment is made when the container arrives and you have confirmed it meets the condition described. This is a significant buyer protection for first-time purchasers.
• Installment payments via PayPal — spread the cost over time without a large upfront payment.
• Military discount (BraveBox Bonus) — active duty, veterans, and military family members qualify for a dedicated pricing discount.
• First responder discount (ShieldSaver) — law enforcement, fire service, and emergency medical personnel qualify for reduced pricing.
• Bulk purchase discount (StackSmart) — buyers purchasing multiple units for fleet, construction, or multi-location use access volume pricing.

Key Takeaways

• A "conex box" and a "shipping container" are the same product — the terminology difference is historical, not structural. Buyers shopping for either are in the same market.
• The two main size options are 20ft and 40ft, with the 40ft delivering significantly better cost-per-square-foot value for most commercial and construction applications.
• Used containers start from around $1,414 at base price in well-supplied markets. One-trip (new) containers start from the low-to-mid $3,000s for 20ft and mid-$4,000s for 40ft high cube units.
• Delivery adds approximately $500 for the first 100 miles plus $5 per mile beyond — always calculate this into your total before comparing suppliers.
• Specialty configurations — double door, side door, open side, high cube — are available in both new and used grades and address specific access and clearance needs.
• Browse live inventory filtered by location, size, and condition at yescontainers.com/products.

Frequently Asked Questions