Update: I went to the store and they said it was fake and doesn't take any money off, but other sites are reporting in the comments that it does in fact work. Hopefully everyone else has better luck
Until 1/27, if you use a mastercard at Best Buy you will get a $50 credit for a $100+ in store with this printable coupon. Read the exclusions to see what doesn't count.
This means lots of free money!
You can take advantage of this in a couple of ways. The coupon does not explicitely exclude gift cards!
You should be able to buy:
1) Visa Gift Cards - Best Buy sells Visa gift cards that have $4.95 fees. You can buy a $95.05 gift card (this will cost $100 after fees) and you will get $95 for the price of $50! That's $45 Free!
2) Amazon Gift Cards - Best Buy also sells Amazon gift cards with no fees so you can get a $100 Amazon gift card for $50!
3) Best Buy Gift Card - To use later.
Make sure to use your reward zone (or sign up) and you will get another $5 in Best Buy gift cards for every $250 you spend. The reward zone gift cards can be used to buy amazon gift cards.
I will try to go today and report back on whether this works!