Would this put you off

Literally unplayable. I'll take it off your hands for 20 pounds, as a gesture of charity.

Wouldn't bother me in the slightest!

I would say show two photos of it when you're selling. Along with this close up, a farther away photo - more in line with what the normal view of it would be to the prospective owner. Close-ups tend to exaggerate reality. The few people who would be put off don't have to bid on it and don't risk the surprise if they happened to be high bid.