Frizzman: I see the point, both of them actually...While I'd feel much as you do, I'd use this as an object lesson on how *I* need to modify my own business practices.
Years ago I sold a safe-queen revolver I'd bought brand new and only put about 100 rounds through in all the years I'd had it. The *collector* that gave me a fair price for it 4 months after his purchase (after similar story to yours-health issues, out of town, etc) told me about a slight imperfection in the bore I'd never observed before. He admitted to cleaning it meticulously, and using a high-end bore scope to find the small flaw.
I had him return it to me less freight both ways. It was in better shape than when I sent it to him....he was meticulous and obsessive, and cleaned it to museum-quality standards.
I was wondering what to do with it. Someone offered me 50% more than the previous buyer. I came out OK on the deal after all.