Baldie,your reply does you credit,and personally I would have the dam thing back,but,
There is a suggestion of "Tinkering" and I don't see that a private sale should carry the responsibility of,Timing,re-conditioning and then guaranteeing a 2nd. hand product,inspected by the buyer and sold for an agreed price.
Somewhere back in the thread someone asked for comments so I'll take that as an excuse for stirring it