Wow, this a high value coupon for Hallmark cards!
Head over here to the CVS website, you will see in the upper right-hand corner "In-Store Coupons", use the zip code 04101 and you will see a coupon for $3/3 Hallmark cards! This expires 5/8, and must be used on cards $1.99 or more.
Note, this is a CVS coupon so can only be used at CVS -- if anyone find a Mfg coupon for Hallmark cards let me know! :)