It appears that our rarity list and pricing guide may be of no use for awhile. The reason is because Sega CD and Mega CD prices are continuously slumping downwards. I see games that once sold for $75 or $100+ now being sold for $10 to $15. There are a few that have been so rare in the past, yet when they pop up, it's only for a few bucks.
Prices obviously are affected by demand, popularity, and possibly the slumping economy. So, as for right now, we're suspending the mega cd rarity list, until when/if things change drastically.