Not a game I'm picking anytime soon with Diablo 3 coming out, but if someone is looking for a deal on this one, you probably won't find better than $36. Seems like a decent followup to Warhawk. I didn't play enough of that either.
EDIT: Looks like it's OOS currently, but you can still order for when they get more copies in. I've bought a bunch of DVDs and BD movies from DD over the years, never games tho, but never had any issues with them honorly backordered product personally.