Whats my desktop worth?

quad core.... 2.4ghz... 4gb ram... ok the quad core isnt as good as the duo... or the i3 (yes even though the duo has 2 and i3 has 3) and the duo n i3 r going for like 440 new on a laptop and desktops r cheaper so... 200 on craigslist would get you some calls. 250 is pushing it..