The ones I usually get ask if I'm a dealer for a certain brand. Then want to buy a ridiculous amount of them (like 30 Sony Bluray players or something). And have them shipped somewhere. Then ask if I take credit card.
Most of the time I don't reply. But ever once in awhile I respond with "I could but I don't think the people you stole the credit card info from will be happy". I never hear back.