Got about $200 in best buy gift certificates that will expire. I see best buy list the Samsun galaxy s3 at a ridiculous $699 price for no contract but AT&T store is $550. Can I just take a picture of att retail price (att store is literally across street from best buy) and will best buy match the $550 price? (Assuming att has S3 in stock which they do). That way I can use my $200 gift certificates and it will cost me $350 plus taxes.