Restaurant.com is offering 80% off any gift certificate for a limited time. To get discount, use the coupon code: DEAL at checkout. This gets you $50 gift certificates for as low as $4, $25 dining certificates for as low as $2, and $10 gift certificates for as low as $1. Restaurant.com’s gift certificates are redeemable at local restaurants across the United States. Some gift certificates have restrictions, like dinner-only or a $15 minimum. Coupon expires June 13, 2011.