http://chargify.com/blog/how-to-choose-the-best-smartphone-credit-card-reader-for-your-business/
If you can pay for a 95¢ pack of gum with your credit card, then you should be able to use your card for that antique mahogany desk at the craft fair! The new smartphone card readers, aside from looking super cool, are also highly functional. Being able to accept credit cards anywhere at any time, r…