Could someone give me an idea of how much the item below is worth please ?

Shuttle SD37P2 - complete with original packaging.

Intel Core Duo 6600 @ 2.40Ghz
2GB Ram
DVDRW Optical Drive
XFX 7600GT Video
250GB Sata WD HD
Windows Vista Ultimate OEM installed clean build with all SP and patches
AVG Free

Thanks in advance