Thinking of buying some used games on the PS2. Any Suggestions?

[--OkeyDokey--]

Don't bother with the first Ratchet. Go with 3 (Up Your Asenal) first. It's the best of the PS2 trilogy.

Also, Jak and Daxter (all of them)
SotC and ICO
Devil May Cry (1 & 3)
Okami
Kingdom Hearts I & II