Get 80% off at Restaurant.com with code NINETY. This coupon code is valid through 9/12. Here is a screenshot for your reference. They sell $25 gift certificates for $10 each. After 90% off, a $25 gift certificate can now be purchased for $1. There are also $10 certificates for some restaurants at just $4, making them $0.40 each after the same coupon code. Be sure to read the rules and fine print of the certificates as each restaurant is different.