ID Bottlings cheaper at the Higher End
I do agree that in general ID bottlings tend to be a bit higher than OB. I will always pay more for a product that is Not chill Filtered, Colored, and at a higher proof strenght. This also means that there was less product to be bottled and costs are higher. If we produced a standard OB single malt it contains on average 50 casks or more, plus lost of water, caramel colouring for some producers, and a whole lot of chill filtration. In the end they took a lot and made a bunch.
In regards to higher price single cask, single malt, at cask strength this in my opinion is just a numbers games. OB like MaCallan seem to be controlling the availability by increasing the cost. Meaning that they are less likely to run out if they chard two or three times the expected cost. Lets face it I know people who buy one bottle of Mac 25 a year, however, they would buy 4 or 5 a year if it were 1/2 the price.