Well, no I don't have one, but I do have my mom's old machine and I've rebuilt the case and went to quite an expense to replace the motor with an exact duplicate ( only it works) and use it often. It's just a 15 clone, was it worth it .... yes it was.
Most of the old machines if they are mechanical can be cleaned, lubed and serviced by the owners. No need to take them to a store and listen to them try to hard sell you on a new plastic computerized piece of junque.
Now, for us that don't know what your machine looks like, can you post us a picture of it?
Joe