Old(ish) pc value?

Hey, Im going off to school and am just bring my laptop with me, for just basic stuff(music,movies,net,whatev) And my desktop is going to be more or less useless when I get back.

So I guess I should sell it, What do you think I can get for my computer?

P4/HT 2.8Ghz
512MB pc2800
80GB sata hdd
Abit IC7-MAX3 mobo
ATI radeon 9800 PRO 128mb
SB LIVE! 5.1 sound card
DVD burner
CD burner
some cheep wi-fi card (hey it works!)
and stuff (big box of cables and other goodies!)

The case its in has been kinda abused, and has lots of fans (it does keep things cool)but I could put it all into something else then sell it?

So, should I even try to sell it or just give it to a friend?

How is that going to be useless?  (Unless it's one of those crappy modern computers that do nothing but run their fans at max and give off heat, of course.)  You cannot have too many computers.