I think the answer is a mixture of a few things. First, you're getting a sweetheart deal in those other 2 cities. Those numbers look very very low to me relative to average PM fees nationwide. Are you sure you're including ALL fees - annual fees, leasing fees, setup fees, renewal fees, marketing fees, etc? How long have these businesses been operating and what kind of service are they providing? It could be that some things aren't included in their "base" pricing which are included in the companies you are comparing against.
I also think you might be cherry-picking Columbus - I don't know of any PM in Columbus who charges both a placement fee and a startup fee.
As a point of reference, RL's amortized monthly charge for the first year on a $1,200/mo rental (Silver plan) per your example is $134, or about 11%. That's in line with the average PM cost (if you include all fees) across the country. And if you bring us an occupied unit, that drops to $109/mo, or 9%. All our prices are right on our website btw.