I'm after some cheap Core 2 Duo era hardware to build a LAN server. It will run a Steamcache to facilitate the distribution of games and updates through Steam, so doesn't need to be high end hardware, and given its limited use (a few weekends a year) I really don't want to spend a lot of money on it. I already have a few C2D era components gathering dust so hopefully others do to and might be willing to offload them. 

Ideally would like:

1 x Core 2 Quad*

1 x ATX LGA 775 motherboard, preferably with 2 x PCIe 16x slots

2 x 500GB+ hard drives

*Already have a Core 2 Duo, but wouldn't mind a Core 2 Quad just in case. Planning to use ZFS for the file system so not 100% confident a C2D will cut it.