Yep and those are the ones that don't sell. I can pull up a crap load of ads on craigslist for all kinds of things such as computers, cars, houses, etc. that NEVER sell because the asking price is too high. I know for a fact that in my city, any thing for a G4/5 Over $150 just gets reposted over and over again. The ones that are at $100 (or less) are the only ones that are removed (thus most likely sold).
I assume you've been to this site called Ebay? Ever notice how a lot of the Buy It Nows sit there forever at outrageous prices. They sit there because no one is willing to pay those numbers. People tend to think their stuff is worth way more than it really is (especially Apple computers).
Looks like 80 to 400 on ebay depending..
http://www.ebay.com/sch/Desktops-Al...1&LH_Complete=1&_okw=&_fsct=&_nkw=powermac+g5