Yeah I have a couple of commodores in my storage left there for 25 years, probably even more, I can’t even be bothered to make time to go there to throw them away
Although C64 and Amiga are not rare by any means (although the Amiga, if you're in the US, wasn't that much of a success in the US compared to the UK/EU), they're highly thought after items. There's no reason to throw them away: just message a forum/board and say "free Commodore in XXX, must come pick them" and some shall gladly give them a second life.
Well, they fetch some money. Still not more than the sticker price when they were new, generally, definitively not more than the inflation-adjusted price!
I'm sure if you had one you wouldn't even connect it to the power, it has a command line, some GUI and prince of persia, which you can play now even on modern PCs with emulators, it has really no use, rather than, I don't know
It was pretty fun that we could actually run games from ~40 year old tape. It impressed my son. It also impressed me actually, because I remember how often those things broke...
If they're Commodore 64's you definitely don't want the use the stock power supplies. Their voltages can drift and can destroy otherwise working hardware.
Every serious retro collector has become an expert on power supplies and capacitors. It is very cool to see and I'm glad it is the power supply and not the more delicate components, at least so far.
Please don't throw them away. Someone will be more than happy to take them off your hands. They are like gold to some people. If you're in the Los Angeles area I'd pay you to "go there" to let me take them off your hands.