Not too sure about that, but you can probably get a rebate on that unit from Panasonic, so you really only spent $4. Since best buy doesn't want to sell these things anymore, I think they are really taking a hit. And Panasonic keeps extending the rebate.
http://www.panasonic.com/consumer_el.../promotion.asp
And yes, even if you don't have the UPC you can get it (many have) as long as receipt says open box.
http://www.panasonic.com/consumer_el.../promotion.asp
And yes, even if you don't have the UPC you can get it (many have) as long as receipt says open box.