In all honesty I would let it slide simply because if you respond to the feedback it will draw attention to it

Loco, what is wrong with drawing attention to it? That would be the whole point of responding  to f/back, just to clarify the situation rather than just let is slide.

So whomever reads is is left in no doubt that the seller didn't do anything wrong!

It's an old saying:

You have a right to your opinion but you don't have a  right to your own facts - facts are not subjects to opinions.