Costco has this 42" Panasonic plasma TV for $1299 and today I saw that Bestbuy has the same TV for $999 on black friday (regular price: $1599). I want to get it from costco because of the warranty. Can I go to costco on black friday and ask for a pricematch for this item with Bestbuy? Or does it have to be in stock when I do price match? Are pricematches allowed on black friday?