Wait, hold on. I just bought a PS3 120 GB for 300. It came with a controller. So even if I added the extra ~$100 on for the headset and game, thats still only $50 cheaper for half the size. Are you sure they were the same size PS3 you're trying to sell?
Also, hell, if people are bidding on it, great. I mean, you want to make money after all. I'd just think you'd want to check to make sure you're not overselling.