C3PX said:
Where do you ever get them 50% off?
I keep my eye on slickdeals.net and cheapassgamer.com. It's mostly rare, so you have to hit it hard when it comes around... K-Mart had a thing wherein, when combined with a coupon, I was getting 1600 pt ($20) cards for $10 + tax. So I got 6 of them.