Hit counter but with paypal deposits = paypal counter

I need a payments counter that is shown every 5USD (or whatever quantity i can change) of any user that makes that payment trugh paypal. Its like a visitors counter, hits counter but with money, reall money. There must be a system where i can notice the payments is from an user that is register to my forum. It can be a data form with the name, the users forum nickname and the paypal buttom, but the payment has to be real before the counter counts 5+. That counter has to have some design or can be modify to whatever design i want later. Or we can chat about it. Pyment from 30-50USD