Many years ago - I think it was about ten years ago - I found a Quadra 660av in the trash. It was rusted inside with dirt everywhere. After washing it and getting some of the dust off, adding a little memory and a decent hard drive, and installing an OS and some software, it became the main machine of a friend who used it for ages. For all I know, he still has it and is using it, but it at minimum was an excellent machine for a good five years.

Do recycle and get some use out of it. It's a good low power compact system.