“Marks on the underside”


I sold a piece of equipment on eBay and described it as having only slight almost invisible blemishes.
The buyer requested to return it to me because of “marks on the underside.”
I granted the return without delay.
Now I’m having second thoughts.  My question is, do marks on the underside which obviously are not visible when in normal use, count as a valid reason for return?

128x128rvpiano
Everything has been said, but I do agree with geof3. I have never looked at the underside of any piece of equipment that I have bought on Audiogon. Who does that?
Oh yeah, I forgot the buyer who wouldn't buy an item if there wasn't any warranty from the manufacturer.
As I told him, 'Then why are you buying used'?
B
I always check the bottom of all equipment I purchase used. I don't care about scratches, but I look for major issues. Like some evidence of a spilled liquid or a drop. Scratches on the bottom mean, well, that it has been used.
Some minor scratches are no biggie, but serious scratches indicate the previous owner had some gear handling issues which can't be good.