ghz desktop computer

I sell my HP Pavilion desktop (system unit only). What price should I start?
It has an AMD Athlon X2 Dual Core 4400 + 2.3 GHz 2GB RAM (DDR2 PC-5300). 364 GB hard drive. Windows Vista Home Premium Service Pack 1.
I have a Pavilion desktop computer. However, mine is one of thousands of [...]