Reading the ask an appraiser section, it seems that most of the general public and most of the RE agents relate $psf to their homes. Why don’t we? One of the responses given by an appraiser was: It is obvious that this appraiser has not done much commercial work, where the $psf is a common unit of comparison. Why is it that most don’t understand that you can adjust the $psf in the same way one would adjust the sales price? But to me, the bigger question is why we do not use it, when it seems to overwhelmingly be the unit of comparison most commonly used by typical buyers, sellers and participants in the market?