Quick Take
Choosing between a used controller, a complete robot arm, and a welding torch is the real decision in industrial robotics cobots. The listed spread here runs from $303.99 for a Yamaha SRCX 05 controller to $7,999.99 for a Nachi MZ07 arm with a CFD controller and teach pendant. In between are a $550 robotic MIG gun and a $2,499.99 Staubli arm/controller system. That means the price range isn't just about cost-it reflects whether you are sourcing one component, a paired controller, or an entire robot package. Keep in mind that a controller alone does not move a robot, and a MIG gun alone does not weld without an arm. The decision gets easier once you identify the missing piece in your cell.
Listed Price Comparison
The table below orders the four by listed price.
| Product | Listed Price | Price Bar |
|---|---|---|
| Yamaha SRCX 05 Robot Controller | $303.99 | |
| American Torch Tip H0114-R314JS Robotic MIG Gun | $550.00 | |
| Staubli RX90 CS7 6-Axis Industrial Robot Arm Controller | $2,499.99 | |
| Nachi MZ07 6-Axis Industrial Robot Arm W/ CFD Controller & Teach Pendant 7kg | $7,999.99 |
The price-bar order makes the gap easy to see: the Nachi package sits at the top, the Staubli arm/controller system is next, and the Yamaha controller and American MIG gun sit at the lower end. That visual matches the functional difference between full-robot purchases and component-level buys.
Decision Matrix
Use this matrix to screen quickly by situation.
| Product | Best for | Key consideration |
|---|---|---|
| Yamaha SRCX 05 Robot Controller | Replacing a controller in an existing Yamaha automation setup | Used, and the bracket is missing |
| American Torch Tip H0114-R314JS | Adding robotic MIG welding to an automation line | New-open-box surplus, no original box |
| Nachi MZ07 Robot Arm | A complete arm and controller package | Highest listed price |
| Staubli RX90 CS7 Robot Arm Controller | A full arm/controller package at a lower listed price | 1997 unit with dent on corner and missing key |
Product Notes
Yamaha SRCX 05 Robot Controller Factory Automation Equipment Bracket Missing

Opening with the Yamaha SRCX 05, this listing gives you a used controller for factory automation at the lowest listed price of the four products. That makes it a sensible target when a Yamaha robot already on your floor needs a replacement brain, rather than when you are building a robot system from zero. The bracket missing in the listing is the main limitation: the unit is incomplete as described, and the used condition reinforces that you're buying a component, not a full package.
American Torch Tip H0114-R314JS Robotic Mig Gun for Automation Welding Equipment

The American Torch Tip H0114-R314JS is the only robotic MIG gun in this set, so it earns its place when your automation need is welding. It is listed as new-open-box old stock at a lower listed price in this group, and it is positioned for automated welding equipment. The limitation is its surplus status: no original box, possible storage wear, and open-box condition mean it may show its age before you run it. It is a specialized end-of-arm tool, not a robot arm or controller.
Nachi MZ07 6-Axis Industrial Robot Arm W/ CFD Controller & Teach Pendant 7kg

If you want one listing that provides the main robot hardware, the Nachi MZ07 combines an arm, CFD controller, and teach pendant. It carries a 7 kg payload and 723 mm reach, and it is also the highest-priced item here, which fits you if the goal is a whole robot package. You avoid the need to source a separate controller, which is a real advantage for a buyer starting without existing robot hardware. The limitation is straightforward: it is used, so you are accepting secondhand condition in exchange for a full set of components.
Staubli RX90 CS7 6-Axis Industrial Robot Arm Controller 1997 *READ

The Staubli RX90 CS7 is another arm-plus-controller combination, listed with a 1997 date and described as used industrial surplus. If the Nachi package is more than your operation needs to spend, this is the main alternative for getting both the arm and controller together at a lower listed price. The limits are visible in the listing: a dent on the corner and a missing key, plus the age of the system. It is a full package, but a clearly used one.
Final Recommendation by Use Case
If you need a complete robot package, the Nachi MZ07 is the one that bundles the arm and controller. If you want a full arm/controller system at a lower listed price, the Staubli RX90 CS7 is the alternative. If you already own the arm, the Yamaha SRCX 05 is the controller-only path. If welding is the task, the American Torch Tip H0114-R314JS is the specialized MIG gun. Match the product to the gap in your line, and the listed price becomes easier to work through.