Custom build I have to let go :(
 

Amd Phenom II X4 965 black edition (~18 months old)
Antec 920 kuhler (2 months old)
8 GB corsair (2 months old)
Cooler Master Storm Trooper (2 months old)
XFX 650W power supply (2 months old)
ASUS M5A99x evo (2 months old)
HD 4670 (~18 months old) should I upgrade before I sell it with a used one?
MK550 Combo Logitech Wireless Keyboard/Mouse (2 months)
LG 21.5 1080P Monitor (1 year old)
DVD Combo

Thanks in advance guys

Around $425-450 if it was parted out, as a whole probably around 350.

Dang $350 you sure!!

thanks for your response though, How about

AMD Phenom II X4 965 Black Edition $70 Low ball
M5A99X Evo All box and accessories $95
Corsair 8GB 2x4GB 9-9-9-24 $35
Antec 920 Kuhler for CPU All box and accessories $95
XFX 650W Power Supply All box and accessories $79
Cooler Master Storm Trooper Case $110
LG E2250V 1080P 21.5" $75
HD Radeon 4670 $25
MK550 Logitech Wireless Keyboard/Mouse $55
WD 500GB 7200RPM Caviar Blue $35
WD 120GB $20
DVD Burner + SD Card reader $10

You'll get more than 350, but you won't get as much as what you just listed.

If you part out you may get lucky with the prices you listed, but when you sell as a whole you don't get nearly what the parts are worth. If your including monitor and keyboard you may get $400 all together, but I doubt any more than that (unless you sell on kijiji to someone that doesn't know much).