My wife has friends who last year took their son to McDonalds while in Geneva on holiday. The child doesn't normally get such fare, and the parents otherwise avoid it for medical reasons (mother has irritable bowel). Anyway, in they went, buying some sort of Happy Meal for the kid and two coffees with a single fries to be shared between the parents. They paid by plastic, and having sat down, got out a calculator on the phone to see what they had been charged, as it seemed a lot. It turned out to be close to $60 Canadian, apparently. They maybe might not have known the numbers, but that's about x3 the cost of it here.
My $5CAD is, of course, more like $4US, which means, I guess, that your $50 conversion is more like $60 to me. And that's about the going rate for a local machine like the one in question in my part of the world. Older ones tend to go for more, of course, as well.
What I didn't know is what has emerged from others' comments in this thread: that the Zip bezel is a relative rarity. I really like the Zip option, because it makes things easy to move around between beige and older machines before USB, so am glad I've got one.