I'd go and ask the question!
If they do, great- if not, I'm not afraid to pack it up and return it (with the receipt) and rebuy it after they credit my card for what I paid for it.
I've done this at Costco, and they usually pull up my transaction on their terminal and just credit me the difference. Especially if there's only one week between the original purchase and the marked down price now.
Good Luck!!