Groupon (GRPN) announced the addition of credit card terminals to the company’s existing payments suite for local businesses. Local businesses have three options to implement Groupon’s payments service on a credit card terminal: configure an existing Verifone (PAY) and Ingenico device; purchase a Verifone vx520 from Groupon for $150 with no monthly contract or fees; or rent a Verifone vx520 to own for $15 per month for 12 months.