ps1 games

i have a list of games that i miss and i was wondering if there was a good place to get ps1 games besides ebay

The following store has limited locations here in the U.S. but i've went to the one here in Vegas and found a good amount of PS1 titles at a low price:
http://www.game-haven.com/aboutus.asp

Another place is Play 'N Trade which I think you may of heard of. They do carry classic PS1 games also.