I had a friend who asked if I had any machines I'd be willing to sell her because hers was on the blink...I had to think long and hard about which one I'd want to sell, so I'm going through the same thing. So, my solution was to loan her one of my machines, all tuned up and ready to go, and I'll see about FIXING her Pfaff. I've never worked on a Pfaff before. Sounds like an adventure!
I do have to say, my Necchi Supernova has all the accessories, cams, bobbins, manuals, user's handwritten notes and that would be one I don't get rid of. I also have a Kenmore with all of its cams and attachments. Also a fun machine to use...oh, they are all special in some way. Oh, I do have a plastic Janome mini that belonged to my daughter....I'd get rid of that in a heartbeat.