Intuit has a credit card verification and payment program called GoPayment. Now GoPayment works with a card reader that plugs into a smart phone.
Sign up for GoPayment by mid-February to get a plan with no monthly service fee and a free card reader for your smart phone. For businesses with low or intermittent volume of transactions, the fee is 15 cents per transaction, plus 2.7 percent when a card is swiped.
For example, if you swipe a card to sell an item you priced at $10, GoPayment keeps (0.15 + 0.027*10.00) = 42 cents, and you receive $9.58 from Intuit.
The fee goes up to 15 cents plus 3.7 percent if the card information is entered by keypad.
The GoPayment app for your phone can be set up to include a list of frequently purchased items, and automatically calculate sales tax. The app can send an itemized receipt to the customer by email or text. Email can include a map that shows where the purchase took place. To simplify record-keeping, data collected by the GoPayment app can be off-loaded to Intuit's Quickbooks accounting software.
GoPayment does not require a long term contract, and there are no setup or cancellation fees. So there is little risk in giving the service a try.
GoPayment's card reader works with many popular smart phones, but not all. Check out the program's website for more information http://gopayment.com/