There was a "lot" of papersafes for sale including the Bearer Bond. I offered to pay .5BTC for the note alone but the seller was only selling the note as a lot with 10 Papersafes. This was in December 2018. I paid a total of 1.1BTC for the lot listed on the Provenance link to acquire the Bearer Bond otherwise the seller was not going to sell it. Hence 1 BTC to "acquire" this piece. Or 1.1BTC if you want to get accurate.
I can confirm this information. I did sell everything that was listed on my papersafe collection page except the silver satoshis. There were a couple of artist proofs and first edition items that won't come up for sale anytime soon.