Well it seems you are looking for a "used" system? I might suggest Anandtech.com forums there have alot of great deals on parts. I agree AGP is dead, gone and soon to be forgotten. I would suggest and older Core 2 Duo. But keep in mind some of the newer stuff requires newer PSU (extra plugs and power requirments). Best bang for buck, i think you can pick up some old AMD systems for $100-150ish. More money, good $50-100 MB and a $100-125 E8400, $50 memory (newegg) and a PSU (and yes, all the other stuff, but most builders have that stuff (HD, Case, dvd rom). Some Overclocked newer chips will lay almost any game.