Where can I sell old computers?

[CloudWatcher]

5. eBay?

For a while people were turning Mac Classics into aquariums. The lexo-lamp iMac might have some takers, it was a pretty cute machine.

Neither are worth much if anything as a running computer. Be sure and note that they don't boot and be careful of shipping costs being more than what you might get for them

Hmm, personally I'd recycle them assuming that the contents of their disks might have personal data on them.

And ... if you want to recover anything interesting off their disks, it's a little complicated but not that hard to pull out the
hard drives and put them in external carriers so you could plug them into your current Mac (if you have one) and copy off
anything interesting.