Ending today at 10 pm ET, Best Buy via eBay offers $100 in Sony PlayStation Network Cards for $80 with free shipping via the steps below. That's the lowest total price we could find by $20. (For further comparison, we saw one $50 card for $32.99 shipped last June.) To get this deal:

1. View the $50 PlayStation Network Card for $50
2. add two to your cart for $100
3. apply coupon code "CMADNESS10" for a final price of $80 with free shipping