What to Consider When Buying a Used Shipping Container

Buying a used shipping container sounds simple on the surface: find one, get it delivered, and start using it. 

In reality, there’s a big difference between a container that “looks fine” and one that actually performs long-term for your desired purpose.

If you’ve ever bought a used car, you already understand the risk. Some options are great value. Others end up costing more in repairs than they’re worth.

The same applies when buying a used shipping container.

In this guide, we will walk you through what to look for, what to avoid, and when it actually makes more sense to invest in a used refrigerated shipping container instead, especially if temperature control is even slightly important.

Why Buy a Used Shipping Container?

There’s a reason so many businesses and individuals look for used shipping containers for sale.souths

Firstly, the price will obviously be lower. Used containers are significantly more affordable than new (or “one-trip”) units, making them an attractive option for storage, workshops, or site use. They’re also widely available and built from heavy-duty corten steel, meaning they’re designed to handle harsh conditions for years.

Most containers have already spent 10–15 years in shipping service before being repurposed, which means they’re still structurally strong, just no longer suited for international freight.

There’s also a sustainability angle. Choosing second-hand shipping containers keeps them in use rather than sending them to scrap, making them a practical and environmentally conscious solution.

But here’s the catch: not all used containers are equal, and that’s where most buyers go wrong.

Used Shipping Container Grades

Before you even inspect a container, you need to understand how they’re classified.

Shipping containers are graded based on condition, which directly affects used shipping container prices, lifespan, and suitability.

Common shipping container grades:

One-Trip (Near New)

• Used once for shipping
• Best condition available
• Higher cost, longer lifespan

Cargo Worthy (CW)

• Structurally sound and certified for shipping
• Typically 10–15 years old 
• Strong balance between cost and quality

Wind & Watertight (WWT)

• Guaranteed to keep out the weather
• Suitable for storage
• May have dents, rust, and cosmetic wear

As-Is

• Lowest grade
• May not be watertight or structurally sound
• High risk (generally not recommended)

A cargo-worthy container is often the sweet spot, structurally reliable without the price of new. Meanwhile, WWT containers are fine for basic storage but shouldn’t be mistaken for export-grade units.

Understanding these grades is critical because it determines what you’re actually buying, not just what it looks like.

What to Check When Buying a Used Shipping Container

Here is what separates a smart purchase from a costly mistake:

External Condition & Structure

Start with the exterior.

Look for:

• Rust (especially deep corrosion)
• Large dents or bowing
• Damage to corner posts

Corner posts are critical as they carry the load when containers are stacked. If these are compromised, the structural integrity is affected.

Experts recommend checking for frame bending and major structural damage before buying.

Internal Condition & Flooring

Step inside and check the floor carefully.

Most used containers have timber flooring, which can suffer from:

• Water damage
• Rot
• Soft spots

Damaged flooring reduces load capacity and can require costly replacement. You should also look for stains or contamination, especially if the container was previously used for chemicals or industrial goods.

Doors, Seals & Security

Doors should:

• Open and close smoothly
• Seal tightly
• Lock securely

Worn or damaged seals can lead to water ingress, one of the most common issues with second-hand shipping containers. Door functionality is also essential for daily use. If it’s hard to open now, it’ll only get worse.

The Light Test (Simple but Powerful)

Here’s a trick professionals use: close yourself inside the container during daylight.

If you see light coming through, you’ve got gaps, and where light gets in, water will too.

A wind- and watertight container should completely block all light.

Age & Previous Use

Most used containers are around 10–15 years old, but that doesn’t tell the full story.

Ask:

• How many years in service
• What was it used for?
• Has it been repaired or modified?

A container used for general cargo is very different from one used for chemicals or heavy industrial freight.

Smells & Contamination

Never skip this.

If a container smells strongly of chemicals, oils, or mould, just walk away! Odours often indicate contamination that can affect anything you store inside.

Used Refrigerated Shipping Containers – What You Need to Know

Now here’s where things change.

A used refrigerated shipping container (also known as a reefer) is a completely different product from a standard container. You’re not just buying a steel box; you’re buying a working refrigeration system.

These units include:

• Built-in insulation
• Cooling machinery
• Electrical components

So, the checklist expands significantly.

What to check in a used refrigerated container:

• Cooling performance (does it reach the temperature?)
• Temperature consistency
• Insulation condition
• Service history
• Electrical components

Unlike standard containers, reefers require professional inspection and maintenance. This is why buying from a specialist supplier matters.

When to Choose a Refrigerated Container Instead

Here’s where many buyers make a costly mistake:

They buy a standard container… then try to make it cold.

It rarely works well, especially if you’re storing:

• Food
• Beverages
• Pharmaceuticals
• Chemicals
• Anything temperature-sensitive

Then a standard used shipping container is not the right solution. Instead, a used refrigerated shipping container gives you:

• Active cooling (not just insulation)
• Temperature control
• Reliable long-term storage
• Compliance for sensitive goods

In most cases, it’s more cost-effective than modifying a standard container.

Used vs New Shipping Containers

Let’s keep it simple.

Used containers:

• Lower cost
• More wear and tear
• Shorter remaining lifespan

New (one-trip) containers:

• Better condition
• Longer lifespan
• Higher upfront cost

For many buyers, used containers offer excellent value, as long as you choose wisely.

For refrigerated units, condition matters even more due to the mechanical components.

Common Mistakes to Avoid

If you want to get real value from your purchase, avoid these:

• Buying based on price alone
• Not inspecting the container properly
• Ignoring container grades
• Choosing the wrong type for your use
• Underestimating delivery requirements
• Trying to turn a standard container into a cold room

That last one is a big one and often the most expensive mistake.

Size, Type & Future Use of Your Storage Containers

Before buying, think beyond today.

Common sizes include:

• 10ft (compact)
• 20ft (most popular)
• 40ft (high capacity)

Your choice depends on:

• Storage volume
• Site space
• Accessibility

Also consider future modifications.

If you plan to convert the container into:

• A workshop
• A site office
• A cold storage unit

Then your starting condition matters.

Refrigerated containers already come insulated and fitted — saving time and cost.

Delivery & Site Considerations of Used Shipping Containers for Sale

This is one of the most overlooked parts of the process.

Ask yourself:

• Can a truck access your site?
• Do you need a tilt tray or crane?
• Is the ground level and stable?

For refrigerated containers, you’ll also need:

• A suitable power supply
• Proper ventilation space

Ignoring this step can turn a simple delivery into a logistical headache.

So, Are Used Shipping Containers Worth It?

Short answer: definitely, if you do it right.

A well-chosen used shipping container can last 15–25 years with proper maintenance. They’re durable, versatile, and offer excellent return on investment. But the key is matching the container to your needs.

Let South West Containers Help You Choose the Right Container for Your Needs

Don’t purchase your shipping container from someone who doesn’t know the difference between a good and a bad product. Instead, have complete confidence in the team at South West Containers, as we’ve supplied high-quality shipping containers to leading businesses across Australia since 2013. 

Get in touch with our highly experienced sales consultants on (02) 9605 2444 or email your enquiry to sales@southwestcontainers.com.au.