A PowerMac G4 will run the latest OpenBSD. https://www.openbsd.org/macppc.html I run it on one of my iMac G4's (and on many other non-PPC machines). It occurs to me that if you replace the HDD with an SSD it would also be quite a lot faster.
If you don't want to use it, toss it on Craigslist for sure (if you have a local Craigslist site). Depending on the specs and your location I'd expect around $50-75 CAD (basing this on Vancouver Canada area and habitually searching the words "macintosh", "powermac", "powerpc" etc. literally every day :) )
If you don't want to use it, toss it on Craigslist for sure (if you have a local Craigslist site). Depending on the specs and your location I'd expect around $50-75 CAD (basing this on Vancouver Canada area and habitually searching the words "macintosh", "powermac", "powerpc" etc. literally every day :) )