If you will be buying greeting cards soon, then here is a coupon for $1.00/3 American Greeting cards. This coupon is not valid on the .99 cards, however, you can use it on the cards priced at $1.49 for the best savings. This coupon expires November 15th.
Find the nearest American Greetings retailer near you.
Also, other than making your own greeting cards, a great place for cheap greeting cards are the dollar stores. most usually sell them for .50 a card.