thermofax machines worth more than scrap

Has anyone come across thermofax machines? I found one on the curb the other day here in Perth Australia. It was all intact minus the cord. I was going to scrap it because it is heavy machine full of ally and copper and engine bits. Something told me it might be a collectable so I looked it up. It is still in use by screen printing artists and tatooists. If you find one, see if you can let it go for less than scrap because I sold mine on within 24 hours for A$50. I'm convinced the guy got a great deal from me and I could have got a lot more. Any thoughts from others?