Today only, October 31, 2012, Groupon has $10 Dunkin’ Donuts Card for $3 for first time Groupon customers only. Limit 1 per person. Shipping address required to redeem Groupon offer. Allow 7-14 days for delivery of Dunkin’ Card. Must use Dunkin’ Donuts gift card in store; do not bring Groupon to store. [Store locator]