Posted By:
MW<< In addition, I would think that the multiplier with a rare back is less as the total dollar amount increases. >>
For high grades (PSA 8 & 9) on one-of-a-kind scarcities in the T206 series, I would argue that it's greater.
Edited to add: it looks like you did some "mixing and matching" for your price analysis where some of your PSA 6 prices came from tougher backs.