Restaurant.com has a new 80% off code ENTREE available. The $25 gift certificates are normally $10 or $15 (depending on restaurant), but are $2 or $3 with the code. They also sell $10 certificates for select restaurants for $4, making them 80 cents each with the code.
Note: Be sure to check restrictions for the certificates before you purchase, as they vary among different venues. You really need to do this before you buy to make sure it is something you or someone else can use.