I see this sort of listen often on
ebay stamps. Some uninformed seller thinks he/she has a treasure trove which is actually an overpriced pile of garbage. A few times I have sent messages to gently inform the sellers that they are probably wasting their time and listing fees, only to get back snarly messages, in one case laced with obscenities. It is very hard for some folks to admit someone else may know more than they do- even someone who has collected for decades. This sellers counter offer of $85 shows his head is still in la la land so maybe it's best to just let him find out on his own.