It is a bit suspicious...
Never heard of a hibaihin version for Drac X -> guy has multiples -> they look really new -> From HK -> nothing coming up under a quick yahoo jp seach under "悪魔城 非売品"...
I'd put money up that it's a bootleg.
Mind you, if it's a good deal enough for a clean copy, I'd pay for it, but $175+?!? Pfftt.... suckers.