I say "Yes, keep it." I have a 1959 Singer Slant-A-Matic 401A machine. It, too, is heavy. But then it stays put until I transport it is a sewing machine center for a good clean out. I love my machine; hubby and I bought it brand new from a Singer Sewing Center. If your machine sews well, it's well worth keeping. Take care of the machine, oiling it every six months or so. Try to find an owner's manual on it (I'd try the Internet first). Happy quilting and God bless you.