I think if you go to Bing and search for Playstation, then choose the eBay link on the right side of your screen, there's a 10% discount on the PS3 so long as it's BIN and you pay with Paypal.
There are a few people selling Slims on eBay, most of them are selling them for $320 or so, but I saw one today for $300 with $10 shipping, which would come out to $280 after the 10% CB on the $300.
'bout it at the moment, though.