In mid October I arrived at DSQ airport, and I had to buy a tarjeta because my printer at home did not work. There is a machine next to the window where they are selling tarjetas, and a guy next to the machine. The machine only takes $10 US bills, apparently. It will not give change. I asked the guy who was there to make change and he tells me "Se me acab?." Why cannot they get a machine to make change? Why cannot the guy who makes change abandon his useless post and ask the people next to him to give him change? Why make several dozen people wait for no good reason?