Everything is fine
I myself explained a little chaotically.

I thought that Gary knife was lost. It happens that museum workers
steal exhibits, or a knife could be taken by someone else who has
power, for himself. Nobody knew where he was. And then he pops
up in pictures on ebay. After so many years!

Everything is clear, I did not inattentively read the description.
This is Gary Powers second opener. The knife is with his son.

Hence the search for the original should continue in the museum's storerooms.