anybody interested in mobile phone top up PIN codes for most US carriers? Costs are generally 75-85% of the value depending on the carrier. Price goes down as my overall quantity goes up. For my business, i'm actually on comission. So i'll pay 50$ for a 50$ top up card, but then I get a % back in comission. I'd be interested in selling some codes here to increase my volume. If you are interested, let me know what carriers you are interested in and how much volume you're looking at doing.