WMUTech you are not alone. When I mailed my March birthday I was able to mail it for $.70. Then I did the two Aprils and it cost me $2.45. I asked the lady why so much. She said it has to do with the thickness of the envelopes. I told her I just mail one off month prior and it only cost $.70. She said if the cards themselves and the envelopes that comes with them could make the difference in prices. When I got home I checked all my cards and envelopes from the Dollar Tree and found they are different thickness. Lesson learned.