I was referring to a local basis. I.e. in most cases, plots of land of equal size on a given street are of similar value for similar purposes. My point is that

I was referring to a local basis. I.e. in most cases, plots of land of equal size on a given street are of similar value for similar purposes. My point is that people don't typically monopolise land to the extent that a prospective land buyer has one potential current owner they could deal with. Of course there are always exceptional cases where this breaks down.