If they are in almost-new condition even a set of stock wheels should fetch real close to $100 per wheel before considering shipping. $50 is a smoking good deal from somebody desperate to get rid of them. Sean very explicitly stated he wasn't in a hurry, and was looking for a good offer... although making the information public was probably a little unnecessary
FWIW, to buy a new one from a dealership their price is about $300.00 per wheel.