Who's the A-hole?

[Gorditadogg]

Just thought you might want to play a version of the Reddit game, where the poster recounts something that happened and asks which person is the a-hole in the situation.

I had a transaction with a gentleman on this board a while ago (it doesn't matter when). We had done many deals before. It was a lot of maybe 20 NMty cards from a 50s set break. Commons and minor stars.

The cards were priced individually. Buyer picked 20 cards that he wanted, negotiated a discount for the group, paid the money, got the cards. Buyer looked at the cards, thought several were not NMty but lesser grade. Seller asks buyer to send all the cards back for review. Buyer sends cards.

Seller reviews cards, agrees some cards were over-graded, but notes others were under-graded. Seller offers to either keep the original terms for all 20 cards or else cancel the deal. Buyer says that he wants the 15 or so cards that are acceptable to him but wants a refund on the rest. Seller says it is all or nothing. Big argument ensues.

Who's the a-hole here?