As far as I know, you cannot buy them new any more. However, if you get onto GameStop.com or go to one of the locations, they are 29.99 each. Pretty cheap.
There are 2 wal-marts near me that still hae them for 30.00 New .. But as stated above unless you want to get a halo/afterburner light not worth the cash... Go to game sto por eb and pay the extra 20 bucks for a used SP Well worth it ... Man if the walmarts that have them would drop more I would buy them to sell on ebay or trade in ... But not for 30.00