Updated: Dec 11, 2018
You will recall "Mrs. McGarrett" writing about an auction that was held in Boston recently at which a number of Jack's belongings, including his badge, were sold. The story was picked up by Hawaii News Now. Read the story: http://www.hawaiinewsnow.com/2018/09/26/check-book-em-danno-hawaii-five-o-archive-sells-more-than/
Many thanks to Mike Quigley.