Yo i was considering making a secondary cheapo PC as the old one died of old age...

Watching tomshardware.com always helps so based on their comment i compiled this component price chart that ill share with you:

warning you might not want to overclock the CPU and then u should seriously consider a better CPU (with more balanced fsb and all the secondary features this one lacks)
Also the nvidia card the deceased pc had was destroyed because of the fan getting completely brokenjust when the warranty expired (wich led to the core getting totally screwed) that explains the coice of card, you should consider a bigga one. all thats left is a case+powersupply and an HDD.

OPCION 2
OVERCLOCKEABLE A FSB180 Core 3600 Memoria 360 DDR2-720Mhz (se supone que es el sweetspot, consume 33watios mas)
Intel® Pentium® D Processor 805 134€ (N° Art.: HPFI04) https://www.alternate.es/html/shop/pr...?artno=HPFI04&
Asus EN7600GS Silent/HTD 7600 516mb 149€ (N° Art.: JBXV11) https://www.alternate.es/html/shop/pr...?artno=JBXV11&
Asus P5WD2 Premium (2x G-LAN, FW) 180€ (N° Art.: GPEA20) https://www.alternate.es/html/shop/pr...?artno=GPEA20&
Ventilador Zalman CNPS 9500AT 49€ (N° Art.: HPLZ10)
Kingston HyperX DIMM 1 GB DDR2-750, 99€ (N° Art.: IAIE7L)



YOU COULD CONSIDER ALSO MAKING IT A µATX PC in which case those products are interesting
GigaByte RL 3D Galaxy 119€ (N° Art.: HXLG20) https://www.alternate.es/html/shop/pr...?artno=HXLG20&
Asus P5LD2-VM µATX, sonido, Gigabit-LAN, SATA RAID € 114 https://www.alternate.es/html/shop/pr...?artno=GPIA05&
AOpen G325 (plata) 79€ https://www.alternate.es/html/shop/pr...?artno=TQXN21&

I believe the mobo should accept the chip and enable u to overclock it... but i wont take any responability if it doesnt XD