Affordable PSX RPGS

I recently purchased a playstation along with metal gear solid and FF7. Since I purchased the console I've been looking around the internet for good deals on classic rpgs for it and I've noticed many of the best titles like Suikoden 2 and and the Lunar games are very expensive for games 15 years old. So what are some good rpgs I could get for under 20$? Some help would be appreciated.

Chrono Cross, FFTactics, FFVIII,FFIX,Parasite Eve 1. The other titles are priced 25 and up but they are worth it. I.E XenoGears, Vagrant Story, Parasite Eve 2