I am thinking of selling my PC which I built a couple of years ago due to having a 1 year old running around and lack of time for PC building / upgrading / gaming. I tend to just use the laptop now

This is the system I built at the time, I'd greatly appreciate any ballpark estimate on what it might be worth (I have an idea but I could be off) as I will probably put it up for sale as a complete system as opposed to selling parts separately.
Monitor:
LG M198WA
Case:
Akasa Mirage
Motherboard:
DFI Infinity P-965 S (LGA 775)
PSU:
Akasa 650W P650FF BK
CPU:
Core 2 Duo E6550
RAM:
4 GB total (2x1GB OCZ, 1x2GB Generic)
HDD:
750GB Seagate Barracuda ES (Sata)
Graphics Card:
nVidia GeForce 7900 GTX (512MB)
Sound:
Creative X-Fi Xtreme Gamer 7.1 Soundcard
Onboard Audio
DVD RW:
LG GSA4040B




