I see those pretty often. Maybe it's a regional thing.
I see Ikaruga every now and then, mostly at GameStops. At $39.99, it's going to sit on the shelf for a while, especially if it's disc only, scratched up, or missing a manual. I'm glad I was able to get a copy back when GS was only charging $19.99 (and I got it when a B2G1 sale was going on).