whats a dell like this worth?

thinkin bout downgrading my rig since i just use my laptop in my apartment and pc rarely..so i sold a dell to my dad a bit back, he never used it and im thinkin about buying it back for $200 (what i sold/got it for)

specs:
x2 3600+ (am2 i think)
1gb ram
250gb HD
dvd-rw
vista basic

i dont game anymore, so onboard DVI is just dandy, plus its got the perfect chipset for modding 360's

For 200 you can build a better machine then that, unless if that comes with a monitor and such.