How to Choose a Used Industrial Robot Arm: Comparing 4 Options Across the $2,500-$8,000 Range

Comparing four used industrial robot arm listings from $2,499.99 to $7,999.99-an L.J. Electronics 5-arm lot, a Nachi MZ07 with controller and teach pendant, and two Stäubli units-to help you pick the right fit for your workcell and budget.

Last updated Aug 17, 2026

If you're shopping for industrial robotics and cobots on the used market, the first thing that becomes clear is how wide the price gap is between similar-looking arms. In this set of four listings, the least expensive option is $2,499.99 and the most expensive is $7,999.99-the low-end listing sits about 69% below the high-end one. The harder question is whether the right choice is the one with the lowest number, the one with the most complete package, or the one that fits an arm ecosystem you already own. These four used listings are different enough that the decision should start with your workcell, not the price tag.

Quick take

The L.J. Electronics ATLAS II lot is the only multi-arm bundle in the group. The Nachi MZ07 is the most complete single-cell package, with a 7 kg payload, 723 mm reach, CFD controller, and teach pendant. The Stäubli RX130-B is a French-made arm assembly in the middle of the range. The Stäubli RX90 CS7 is a 1997 controller at the lowest entry price, well matched to someone with an existing RX90 system.

Listed-price comparison

Product	Listed price	One-line takeaway
L.J. Electronics ATLAS II (Lot of 5)	USD 5,225.99	Multi-arm bundle
Nachi MZ07	USD 7,999.99	Full 6-axis package
Stäubli RX130-B	USD 3,410.00	Mid-range arm assembly
Stäubli RX90 CS7	USD 2,499.99	Low-cost controller

Use-case decision matrix

Choose the L.J. Electronics lot if you need multiple arms that power up and can tolerate visible wear.
Choose the Nachi MZ07 if a 7 kg payload and an included teach pendant matter more than budget.
Choose the Stäubli RX130-B if you want a Stäubli arm assembly in the middle price band and plan to handle the controls side yourself.
Choose the Stäubli RX90 CS7 if you already have an RX90 arm and need a CS7 controller at the lowest cost.

Product notes

L.J. Electronics ATLAS II 2 Industrial Robot Arm (Lot of 5)

This listing bundles five L.J. Electronics ATLAS II industrial robot arms with accessories. The seller states that all five power up and that the units came from a state surplus sale, with no prior usage history known. It is the only multi-arm option in this group, so it fits a lab, classroom, or bench setup where several arms are more useful than one high-spec arm. The limitation is the condition caveats: visible missing and broken parts, one front LED that does not blink, and a no-returns as-is sales structure. You are accepting those unknowns in exchange for having five arms to work with.

Nachi MZ07 6-Axis Industrial Robot Arm with CFD Controller & Teach Pendant

The Nachi MZ07 is the most complete package in this group for someone who needs a 6-axis arm. It lists a 7 kg payload and 723 mm reach, and it includes the CFD controller and a teach pendant, so the major control pieces are part of the same listing. That sets it apart from arm-only or controller-only listings. The limitation is the budget side: it carries the highest listed price of the four, and the unit is used, so you are paying a top-of-range price for completeness on a used robot.

Stäubli RX130-B Industrial Robot Arm

The Stäubli RX130-B is a French-made robotic arm assembly listed at $3,410.00, with a standard construction type and arm-type controls. It is a middle-priced way into a Stäubli arm if you already have a controls plan and want a specific model in the RX130 family. The limitation is that the price sits noticeably above the RX90 CS7 controller, and the unit is still used, so the mid-range price needs to be justified by the value of this specific model to your cell.

Stäubli RX90 CS7 6-Axis Industrial Robot Arm Controller (1997)

The Stäubli RX90 CS7 listing is the lowest-priced option in this group, and it is specifically a 6-axis industrial robot arm controller from 1997. For an owner of an RX90 series arm, this is the least expensive way to bring in a CS7 controller. The listing is clear about the physical caveats: a dent on a corner, a missing key, and only the items shown in photos are included. It is sold as used surplus, so the condition wording should set expectations for a project piece rather than a ready-to-run arm. That makes it a practical match only if you have a specific RX90 system in mind.

Final recommendation by use case

For a lab or classroom that needs multiple arms that power up and can accept cosmetic wear: the L.J. Electronics ATLAS II lot.
For a workcell where a 7 kg payload and an included teach pendant matter most: the Nachi MZ07.
For a buyer who wants a Stäubli arm in the middle price band and has a control plan: the Stäubli RX130-B.
For an existing RX90 owner who needs a CS7 controller at the lowest cost: the Stäubli RX90 CS7.

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