Ooh shit, boxed even. Yeah maybe throw another fifty bucks onto my estimate.
Warning: Neo CD loading times are BRUTAL. They're every bit as bad as you've heard, if not worse. It's acceptable for a shmup, run n gun, or platformer... But pretty bad for most puzzle games and HORRID for fighters. Anything where you're switching backgrounds frequently, you'll want to throw it through a window.
Region of the Neo CD can be changed from Japan to US to Eur with a single jumper, BTW. You can even install a switch if you want. But unlike changing the region of an AES or MVS, that won't change the language of the game. CD games have only one version on them.