It took me years but I finally USED up my stamp collection as postage. I have a few remaining, mostly space stamps, and those items that did not sell on Ebay. Have a stamped envelope with, if I remember correctly, 22 million miles on it. The envelope flew on the Challenger and as we all know that can't be done again. Quite a colorful folder, along with information and 3 postmarks. They couldn't land when and where they were supposed to so on to the desert they went. Take off postmark, failed landing postmark and actual landing postmark. And of course a photo of the crew. There is a letter stating how the US postal service teamed up with NASA to bring us this rare and unusal commemorative in a once in a lifetime opportunity. I actually sat down and figured up how many millions of dollars they made (from stamp collectors) for putting that small box of envelopes on board that flight. If I remember correctly it was over 13 million. Sure was nice of them to provide the space for that box full of envelopes on the Challenger to benefit us stamp collectors. The government is sooooooo good to us!
For what it is worth I am going to offer the two Vatican coins for sale on this forum at a cheaper rate than I would sell them elsewhere. If your interested check out the "For Sale" posting between now and the 6th as that is when I will put them on Ebay.