Price comparison

We have comparised 8 computers with a multiseat of 8 monitors, keyboards and mice. We tried to have as cheap computers we can, these are the system requirements we chose:
Motherboard
-Intel Motherboard D946GZI uATX, 800FSB, 2Ch DDR-667, 10/100, 6ch HDA, Int/PCIe Gfx box/single
90 eur.
Processor -Intel Celeron 420 Socket 775 1.6 Gigahertz, Fsb 800 mhz Boxe
45 eur.
Graphic card
-XFX Geforce 6200 256MB AGP TV-OUT DVI
49 eur.
RAM memory
-DDR RAM PC3200 400MHz 512MB
30 eur.
Soundcardt
-Tybotech Soundcard PCI 6 channel, C-Media
12 eur.
Speakers
-Labtec Spin 85 Speaker 2.0
15 eur.
Network card
-Intellinet PCI NETWERKKAART 100MBIT
17 eur.
Hard disk
-Dell harde schijf 120 GB – 5400 rpm
169 eur.
Mouse & keyboard
-Microsoft Optical Wheelmouse WIT
17 eur.
-LABTEC Media Keyboard
8 eur
Monitor
HANNSG 17" TFT scherm Wide HW173AB (8 ms)
120 eur.
Total price 1 computer = 571 EUR * 8 pieces = 4568 €

Multiseat 8 pieces = 3230 €
Processor: Intel Core 2 Duo E6550 Dual-core
Memory: 2048 MB DDR-2 (800 Mhz)
Hard disk: 320 GB - Serial ata
Nvidia Geforce 7300 256 Mb
DVD-writer 16x Dual-layer
Monitor: 8 x 17" LCD
Input devices: 8 x keyboard & mouse