I bought this off eBay at a too good to be true price (One of those deals where you bid on it not thinking you'll be the high bidder.) The handwriting seems to match Truman's old age signature and the seller even included the franked envelope from Truman which looks like it was postmarked December of 71. Was Truman known to have any secretaries sign for him during his post presidentcy? Everything looks good, I just can't believe I got this for under $30! What do you think?