Without any more details as far as what chip it is (speed, etc.) and what kind of memory (speed), I can’t offer much more.
I got my Dell Latitude D630 which would probably blow this out of the water for $450 (with 1yr of Gold Support warranty from Dell) on EBay, hence why I only offered you $100ish.
I need more details…
Go to start > run > type in ‘dxdiag’ and list the chip information, video card information, etc. in here please.