Thank you for all the helpful responses. Hopefully others that are also going to be looking to but one will find this helpful in the future. The one that I am looking at getting came from a school and is only 18 months old. The seller doesn't know that much about the details of it, but all of the cables and seem to be there. The exception is the SmartPad. Cosmetically, the case is in excellent condition and the arm is as well. I will get a power cord modified so that I can plug in the KRC4 and at least fire that up.
Interesting bit about the SmartPad reliability. I've been looking and see that there are several on ebay. They all look cosmetically good. Is there anything that one needs to be aware of with buying these? Are there different generations of these, some that are known to be bad? There are serveral that are being sold by ppl in China, any concerns about these being counterfeit (the sellers seem to sell other robotic things also)? I am I correct in assuming that any SmartPad is compatiable with and KRC4 generation controller? Are there any other places to buy used SmartPads, seems like buying it from KUKA will be like 5k.