Bolender 27 (BB-113) is a common variety that is readily available in the marketplace. High grade examples are becoming more and more expensive, but can still be found with relative ease. Mint State examples are very rare and collectors prize themn highly. The Condition Census consists almost entirely of Mint State examples, some of which are only low-end Uncs. The very best example is the PCGS MS65 formerly in the Norweb Collection (sold in 1988 for $33,000. Another stellar BB-113 is the high-end Unc. from the Garrett Collection -- a Gem that sold for $65,000 all the way back in 1980!
B. Max Mehl 11/1954:10 - Norweb Collection - Bowers & Merena 11/1988:3756, $33,000
Stack's 10/2005:1416, $11,500
Bill Nagle, sold privately in 1/2012 - Eugene H. Gardner Collection - Heritage 5/2015:98558, $37,600