That was a $30 Plextor rebate. The price of 716A at Best Buy has always been $130, except for a few days in early March when it was lowered to $101 due to a pricing mistake, when somebody at Best buy thought the Plextor rebate period has ended while it continued through the end of March. In those few days, it was possible to get 716A for $71 after rebate.
Also note that this thread is about the Serial ATA version of the 716 which was not and is not sold by Best Buy. 716SA has always been about $10 higher.