PCS - Presidential Medals Cover Collection

I have a complete set and would like to know the cost and value. Each President cover has a dated stamp from the presidents place of birth, stamped on the presidents birthday, an electroplated Special Collector's Edition of Official U.S. Mint Presidential Medal by PCS. I am not a collector and think this is a great collection as I looked at the different presidents and their signatures. It was very informative and interesting statements from each president as relates to todays events. As an example, George Washington's has the 3 cent Washington's Inauguration stamp of 1939 and the 18 cenet U.S. Flag stamp of 1981. The set ends with Ronald Reagan.

I agree. It has an educative and historical value. How did you come to own it (as a "not collector"?