Depends on why you want to dump it. Are you getting out the darkroom, want to replace it with a newer model? If you are looking at buying a newer model, if you have room why not keep it so you can do muiltiplue negative print tricks? I keep an old Burke and James Solar that I had in college at my parents for 20 years, then used it as a second enlarger until I moved and no longer had room for it and my D 3, so I gave to the Goodwill, I check it lasted 2 days and was sold.

Regards