R9 280x's are selling for upwards of $450 on ebay! I'm actually considering selling my 3 days old 280x to buy a GTX 780.
Newegg has raised the price for your average 280x from $300 to $390, and at the moment all of them are out of stock. This coin rush is really fucking things up for gamers. I'm just glad I got mine for $300 w/BF4 before this craziness started.