Welcome! When I was at school a few years ago, the place also went through the same transition to the "Dark Side" and replaced numerous Macs with the black Dell Optiplexes. The foundations of my collection came from the school and I managed to save most of the good Macs and take them home. They were mostly of the Plus, Classic and LC era though I did also score a PowerMac 5200 and an iMac.

It sounds like you have had a good haul so far, especially so with the eMac. Good luck in your future conquests!