Yup, ebay has some good deals. To give you an idea I blew out passenger side front and back wheels and the rims were completely destroyed. Dealer charged $750 for new stock wheels and tires insurance covered that tough.

 

$300 sounds fair. If you don't get any higher offers than the $250 deal, I'd go ahead and sell them. I'd guess that there are way more people looking to buy aftermarket wheels than factory wheels, so I'd hate to see you miss the opportunity to sell them.