a .1 BTC Silver BF/Blk that was graded PCGS SP 70 fetched $33,600 at Stack's Bowers last year.
You have 4 BF Blks, and three of your coins are better than the one above, in my opinion.
Steeley
That coin was funded, so a little bit different.
Stacks would be the best place to auction these coins though, a lot of whales there just starting to get into crypto collectables.