The machine ask it's users what they need the money for and takes one guy's watch and gives it to someone else.

You can check out hbogo.com (http://www.hbogo.com/) they have all their shows on there.

I'm looking for it too! I think it was a student film from Miami-Dade Community College in S.Florida produced in the late 70' or early 80's...

It was called "Mr Money". What a great little short. Used to have a VHS copy recorded off HBO until the kids taped over it sometime in the 90s. Looking for it also.