It is surprising what you can find by posting an ad for 'unwanted macs, will pickup'
Over the past year I have found:
Duo 230
SE
IIFX
100
170
Beige G3s
SE/30
4x LC 475s
There is a lot out there but alas many are recycling and/or trashing them due to 'sensitive information'. A lot is lost that way.
As for the IIfx. It dings when powered up but at the time no monitor was connected. Good sign though. Now to figure out which video card to connect the monitor to...