From Doug Winters Blog:
"....Considered as a whole, the biggest losers among the entire Liberty Head $20 series were neither the rarities nor the common dates - they were the issues in between, i.e., the better dates, but not the best dates. These include several of the T1 $20s and the relatively more common Carson City issues. These scarce-but-not-rare issues were the ones that were most heavily “Fairmonted.”
For the most part, the prices for the rarities did not respond at all to the appearance of the double eagles from the Fairmont Collection. This is, perhaps, no surprise, as it quickly became evident that there were few, if any, of the important rarities among the Fairmont double eagles - for example, there were no 1854-O, 1856-O, or 1861 Paquet reverse coins."