[stouset]

Okay, but it's still likely uninteresting because of the Sorites paradox. There's an arbitrary definition of when a town becomes a city because there has to be some threshold, and the list of cheapest cities is probably mostly indistinguishable from a list of cities that were the closest to being towns.

What would be interesting (to me anyway) is a list of some cities who are disproportionately cheap related to their density.