Pawn stars on Facebook did the same thing. Their gold are candies. Originally one had to pay for the candies and then they rolled out a candy dispenser. I don't remember how much it cost, but it gave one candy every eight hours. You had to have to save a few weeks to do anything decent, but it might work here because people would still buy gold to go higher faster. Rather than have a building dispense it make it a newspaper stand that can't be robbed.