I've seen the US release of Contra 4 for $20 at Fry's Electronics.
This has been $19.99 (universal price drop) for several weeks now.
"One of the ways I gauge a DS game is by recharges. "...Tycho (Penny Arcade)
But for us in germany, thats one of the few sources shipping to us
I've seen this game free. Some dude at gamestop was going crazy about its difficulty and said he hated it so bad, he'd give it away free. So I snatched that second copy. FREE.
I just picked it up last night at Wal-Mart for $15 on clearance