Tom:
These "wall machines" are foreign machines. Typically German. Therefore, don't expect it to work with US coins unless it has been converted.
I bought a wall machine in a garage sale years ago. The guy was asking $500, I offered him $5 and he took it
. I didn't even know what I was buying but I figured for 5 bucks, what the hell.
The machine you are looking at appears to be in nicer shape than the one I bought.
It took me a while but I finally got it working, had to have a friend come over who understood german so she could translate the instructions on it.
These things usually run on 240 volts so you might need a transformer to get the thing to work.
Dave