EBay seller "stevessupercoolstuff" says it's an "original SR-71 Blackbird vertical tail rudder," the "buy it now" price is $1,000,000 (you'd be responsible for shipping and handling), and he or she will accept PayPal. For the asking price, the seller's posting Friday offered one picture and a four-sentence description. Two of those sentences don't describe the item, but the seller is inviting queries via email. The picture shows a fin decorated with a Lockheed Skunkworks insignia and the numbers 17955, which, if authentic, links the part to a specific aircraft and its history.
This is a companion discussion topic for the original entry at https://www.avweb.com/news/sr-71-vertical-fin-on-ebay-condition-used