I'm a big skeptic when it comes to used Mac pricing. When people say cheap, make sure they don't mean cheap in comparison to what the computer cost when it was new or what a new one would cost and is in fact just generally inexpensive. People are still trying to get $1000+ for PowerMac G4s, which is really sad. Sure, we Mac users that bought new systems had to pay a lot, but that's no reason to gouge people buying your now-used and most likely old computer.

That reminds me... I need to try and gouge people by selling an old iMac. Muwa ha ha ha!
DP 1.08GHz PMG4 MDD, 1GB PC2700 DDR, 200GB ATA (16MB, 7200RPM), Radeon 9800 Pro (256MB)