Also keep in mind finding most of the black variants for Color Dreams/Bunch Games games will net you more value as they are pretty rare. I have #4-5, #7-12 on this list. If you ever find #1-3 or #6, let me know. I'll pay handsomely for them. :P I'd probably had them all if I didn't take a break from collecting - at the time, those 4 hadn't surfaced yet!
http://www.nintendoage.com/forum/mes...threadid=10081
Raid 2020, Crystal Mines, Captain Comic, Metal Fighter, Baby Boomer and Bible Adventures are borderline common/uncommon and the most common out of the bunch.
Silent Assault, Robodemons, Master Chu, and the rest of the Wisdom Tree games would be uncommon.
Galactic Crusader, P'Radikus Conflict, Moon Ranger, King Neptune, Castle of Deceit and Pesterminator are borderline uncommon/rare.
Mission Cobra, Tagin Dragon, Challenge of the Dragon, Menace Beach, Operation Secret Storm and Secret Scout would qualify in my book as firmly rare. However, none really break the barrier of being worth more than $50 loose in my opinion.