I have 16 Amigas and want to hang on to my hord. OTOH, I acquired almost all of my collection by rescueing them from recycling or worse (My 3 A2000s were rescued from a public access station, a tech there wanted blow them up for his home video.) I get them for a song and preserve them. There is a finite number of these left in the world and it's getting smaller. Besides, I have large, dry basement. I'm also designing a compact display-work space.
After I get them, sometimes I'll expand them to some unique or logical purpose (a Toaster system, A500 married to A570, haunted house special FX, etc). This is the fun part.
I would probably part with some of this stuff if there were local enthusiasts near me. OTOH, I'd be furious if one of my former 500s were gutted and it's insides were replaced with an ATX mb.