Well that depends perive country/region and what you can spend.

I recently bought a AMD AThlon XP 3000+ Barton , ASUS A7n8x deluxe mobo, 512 Mb ddr with 2 x 80 Gbs Ram and a geforce FX 5600

but then again i'm not a hardcore gamer...

You should get your wanted specs together and then put up a patient search to the cheapest store.
For me it was in ******, Germany.. but I think thats a lil far no ?