Hi Dan,
Since we spoke about everything from audio to racing cars, it's clear to me that this is not an, "your an idiot and didn't notice issue", but a slimy or ignorant buyer issue. I think that this deserves a personal inspection at the buyer's home. It's too convenient a problem. Go inspect personally. It's either true or not. Either way, you get to eyeball the buyer and determine whether you trust and believe him.
It's easy enough to make the decision at that time.
If he's being truthful, I'm certain you won't have any difficulty with how to resolve the matter.
Best wishes,
Bill E.
Since we spoke about everything from audio to racing cars, it's clear to me that this is not an, "your an idiot and didn't notice issue", but a slimy or ignorant buyer issue. I think that this deserves a personal inspection at the buyer's home. It's too convenient a problem. Go inspect personally. It's either true or not. Either way, you get to eyeball the buyer and determine whether you trust and believe him.
It's easy enough to make the decision at that time.
If he's being truthful, I'm certain you won't have any difficulty with how to resolve the matter.
Best wishes,
Bill E.