Hello,
detective 37 score was not touched. Tec 37 - last solo Batman with end to dark, sinister persona. There are a Total of ONLY 60 copies on the census, 45 Universal (10% being poor copies graded 0.5 or 1.0) and 15 Restored.
Here are a few recent sales all in December 2017
3.5 Universal - $17,500 ( worth 3150 points )
5.5 Universal - $23,600 ( worth 6300 points )
7.5 MP Restored - $9,000 ( worth 2756 points. WTF, worth almost as much as a 3.5 Universal grade )
A 7.5 is coming up to auction and a conservative sale estimate would be $50,000+. It sold in 2015 for $38,240.
I would think an appropriate score adjustment be triple (3X) across all grades/conditions for this particular book.
Thank you for all your work, we registry users much appreciate it.