Posted By:
davidcyclebackIf an item is not returned by the buyer, there's no requirement or guilt trip for the seller to give a refund.
However, giving a partial refund would be similar financially to having had the buyer keep the the misdescribed card with partial refund, or receiving and reselling the card for the lesser trimmed value. Presumably, if the card is trimmed and you received the card you wouldn't get the original sales price upon resale.
As a seller, some of my most loyal customers aren't the ones where the sale and shipping went perfectly every time, but where I made a dumb error and cleared it up to their satisfaction when they pointed it out.