Many people are off late buying used robots and i thought it will be useful for used robot buyers as a reference.
I have numbered them for convenience so i request anyone who adds a tip to continue the numbering...
A few tips to consider while buying a used robot:
1) Always buy robots only from reliable sources (known companies or companies that have a reputation to protect)
2) Inspect the robot for missing hardware, software, batteries, physical damages, motor or reducer damages, big backlash etc.
4) Inspect the Teach pendant and the related cables
5) Check for the required IO board (or atleast a one that you could use)
6) Try to avoid autions with "as is where is condition" terms
7) Do not buy too old robots - you will end up paying more for spares than the robot itself
Always insist on the manuals - robot manuals + the peripherals if accompanying
9) Ensure that the key spares for the robot are available in the market prior to buying the robot - Identify the spares suppliers too..
10) Be aware of the licensing policies from the used robot manufacturers. Make sure of the robot manufacturers' charges.