I had decided some time ago that I wouldn't buy Halo 4. I felt like Bungie had wrapped the series up pretty nicely and the only new feature that I'd seen announced by 343 was a co-op mode that I'd likely never play even if I did own the game. So even though I enjoyed the previous games, I thought the Halo series was behind me.
Then I traded in some of my games at Gamestop. I got store credit since they were offering some really nice deals on the games I had traded in, but when the clerk asked if there were any games I wanted to pre-order with my credit, I couldn't think of any. There are really no games coming out in the next few months that interest me.
So I bought Halo 4.
Are you sure the used market is costing you millions, games industry?