Well.....I'd ask questions just because of how you worded your add.
You said:
"powers on no problem, both channels work fine"
That's pretty specific, and maybe something else is busted. If you said "100% functional" or something like that, then sure.....
"A few light blemishes but pretty much cared for"
****, I had someone say that same thing, and I got the amp, and it looked like it had been dropped off the back of a truck. Some people might think it looks pretty **** good, and some people might think it looks pretty **** bad. Purely a person to person thing. I would definately ask you a question about the condition if I was thinking about buying it.
Bottom line is.....People get ripped off on
ebay, and because of it, decent people like yourself are going to get asked questions that should not need to be asked.....But it's just how it is.