I also bought a new system ...
AOpen G528 casing
Asus M2N68-CM
AMD Phenom II X4 920
4x 2GB 800MHz Kingston RAM
2x 500GB WD Caviar RE3 (gmirror RAID-1)
SeaSonic S12II-500
Intel PWLA8391GT NIC
Seagate 80GB and 400GB hard disk migrated from my old system.
Total cost about 520 euro ... I bought the CPU on ebay for 140 euro (New in box, sealed), the rest is new ...
The CPU is so fast, this system is replacing a PIII 800, I was used to getting coffee with cookies when building a port ... Now it's done before I can get out of the chair