Why not buy a intel mac don't stay in the dark ages. With all those computers you have you could probably grab a macbook (Kind of)
Powermac worth $210
eMac worth at "least" $220 for a collector
And all those iBook clamshells would be worth another $200
So $630 and some of your own cash you could probably buy a end of life macbook or something for a deal
Can't sell the Power Mac,already sold the eMac,and only have my one broken ibook left which I'm on at my friends right now using an external keyboard mouse since my tractpad and keyboard on it died.I'm getting a PowerBook G4 1.5Ghz.Can't afford anything newer.