[GaryPassamonte]

An 1876 Boston- Hartford scorecard sold for just under $1300. in a REA in 2011. An 1876 Chicago-St Louis scorecard, which I believe is similar to Patrick's, sold for less than $1000. about a decade ago. The highest price for a professional post 1870 scorecard I can find is for a game between Boston and Hartford in 1875. This scorecard was significant in that it represented a record of the final National Association game ever played. This scorecard sold for almost $5000. and, until the recent sale of the Chicago-Boston scorecard, no other scorecard has come close to this selling price.
I can't definitively answer why these scorecards don't bring higher prices, other than the fact that they aren't particularly attractive, because they are quite rare. The exceptions, regarding scorecards, would be those issued by Mort Rogers. These cards are expensive and I believe this is due more to the photographic images included than to the historical significance of the game involved.