Sabine when you look close a lot of those machines are missing a bunch of parts. I don't think I would mess with them. There might be a few salvageable machines or usable parts but the reality is some parts are more commonly broken or missing than others and those are the parts that demand a premium when buying or selling them. If those parts are missing then the machine is most likely scrap.
Miriam I love the foot controller on the W&G.
Rodney