I am a bit of a newbie here and have seen a bit of information on the net regarding Coinbase and Bitstamp being great exchanges to use to purchase coins, but being as though they only offer much of the main cryptos coins, I am not able to purchase any of the alternative coins that are cheaper. Plus, since I reside in the States, some of the other exchanges cannot do business with US residents. So, I wanted to know if anyone knew of any alternative REPUTABLE exchanges/brokers to go through that could provide service to US residents, as well as have the option for purchasing the less popular/cheaper coins?