Aximsite.
Personally speaking, I wouldn't mess with the CDs on ebay, but that's just me. Of course I have plenty of games to keep my occupied already - check out my View MyPDA section over to the left :) I haven't updated the list in a LONG time, but it will give you some ideas. Lots of games have demos available so you can try them out before you plunk down your $$. Astraware, Clickgamer, eSoftInteractive and PDA Mill all have some really great games. What type of games are you looking for?