Or where you invest your time, energy, efforts, paper, fuel, etc. to get lists from say a City source like several mentioned above don't include equity.  

That is, if you find an undervalued asset in regard to the NOI because of, say, a bunch of amenities missing, or a bunch of additional revenue streams missing, or a bunch of expenses that can be shrunk, or especially a bunch of dated interiors (to a lesser degree, the exterior), one can find a legitimate and marketable way to raise rents, one could see a $50, $100, $150 per door rise in NOI.