[AJ007]

The only feedback the seller mentioned was in the buyers leaving it for him.

If the seller required a good account history, and stuck to the US, he may have not had these problems. Arguably those buyers could have screwed him on anything (remember the story about the rare violin destroyed at Paypal's request.)

There are things worth a lot more than $90 bought and sold on eBay every day. I would argue that buyer to seller reputation and thus integrity is more important than the reputation of the marketplace or medium of exchange.