These pages include a number of reviews of older games. If you are looking for older games, there are a few things to try.
or one of the other online auction places for new or used copies of the games.
I've bought several games via ebay now, including Amber, Shivers, and Obsidian. I've also bought The Dame was Loaded and The Elk Moon Mystery in my local supermarket.
I've had a report of rare software available at Dollar Tree.