hey guys, i've been coming across some deals on ebay, and used amps are so much cheaper than new ones. but what am i looking for in a used amp that would tell me that it is no good?? i mean, what is it about using an amp that makes its quality go down? i would love to save $$, but at the same time don't wanna end up taking the shaft cuz of something in front of my eyes i didn't notice. any help is appreciated.

 

about as trustable as the guy selling the used amp.