a ver que te parece esto:
30657 Intel Core 2 Duo E6550 2.33GHZ FSB1333 4MB Box 775 124.14 1 124.14
30825 Gigabyte GA-P35-DS3L Socket 775 75.00 1 75.00
28369 Kingston ValueRAM DDR2 667 PC2-5300 2GB 2x1GB 39.66 1 39.66
16031 Seagate 250gb 7200 Sata 3GB 52.59 1 52.59
29270 Asus TA-210 ATX 29.31 1 29.31
30969 NOX Urano 500W 31.90 1 31.90
30505 Captiva Geforce 8500GT 512MB DDR2 PCI-e 56.68 1 56.68
31236 LG L1953S-SF TFT 19" 5ms 146.51 1 146.51
SUBTOTAL IVA(16%) TOTAL
555.78 103.15 644.7
con 30 € mas te lo montan y lo testean, ademas ahi tienes monitor de 19 si quieres verlo tu mismo
http://www.pccomponentes.com/
edito: aqui te dejo una version un poquillo mas barata con amd
26786 AMD Athlon64 X2 5000+ 2.6Ghz AM2 Box 86.21 1 86.21
30909 Gigabyte GA-M56S-S3 nForce 560 Socket AM2 57.76 1 57.76
28369 Kingston ValueRAM DDR2 667 PC2-5300 2GB 2x1GB 39.66 1 39.66
16031 Seagate 250gb 7200 Sata 3GB 52.59 1 52.59
29270 Asus TA-210 ATX 29.31 1 29.31
30969 NOX Urano 500W 31.90 1 31.90
30505 Captiva Geforce 8500GT 512MB DDR2 PCI-e 56.68 1 56.68
31236 LG L1953S-SF TFT 19" 5ms 146.51 1 146.51
SUBTOTAL IVA(16%) TOTAL
500.60 92.91 580.7