Why cant I find MOTOR STORM 2 and anywhere?

I've been looking for that game in multiple Gamstops for more than six months and I cant find it new or used. Why is that? Did Sony not print out many copys of the game? Also been out for since winter of 08 so I was thought it was going to be on the "Greatest Hits" by now,but still nothing.

Amazon.com

Motorstorm 2

Here you go.

EBAY got a bunch of copies and it looks like you can get it for right around the $20 mark on there

online shopping ftw. don't support gamestopAJC3317

Amazon? Anyways, I recently found it at a closing hollywood video store. It was $15. The only games I bought were Resistance Fall of Man, and Socom: Confrontation. Thinking about going back to pick up Motor Storm 1 + 2, and Maybe Batman: Arkham Asylum