We have numbers of sites can be recommend. These are with decent faucets. They would be rollin.io, bitdouble and primedice. These are really listed as trusted sites where you can definitely bet on without worries. We can really see a good turn over. At times, profits are made sure. The site "bitdouble" is pretty new.
"where can i buy bitcoins" is different than "where can i gamble bitcoins"
suggesting rollin.io, primedice and other gambling site with faucet is not what op needs and it could only get him to lose his hard earned money since he intend to buy bitcoins from his cash