I have listed my complete set (red, yellow, blue, green, black) of Crypto Stamps that were bought from the Austrian Post Office "On Chain Store" (OCS).

Only 500 of these stamps exist, and only three red stamps were ever sold from the OCS, which makes this set particularly rare. The stamps remain in "Sold" status, which means the buyer can submit their shipping info after purchase and receive delivery directly from the Austrian Post Office.

The listing is on Opensea, in dutch auction format, here: https://opensea.io/bundles/complete-set-of-ocs-stamps-unshipped

Price starts at 50 ETH and will drop to 15 ETH over the next week.

Thanks and good luck!