How much should I sell this box for?

I'm trying to gauge how much I should ask for the following. It does not include a hard drive or OS.

Intel Core 2 Duo E8400 @ 3.00 GHz
Gigabyte EP45-UD3R Motherboard + box
4 GB RAM @ 400 Mhz
ATI Radeon HD 4850 + box
Antec 300 Tower + box
Corsair VX550W PSU + box

Thanks in advance for any suggestions.