Can you identify this cheap single speed bike? Is it worth $250?

Seller says he bought it for $350 from a bike shop.
It's got no visible decals from the pictures...
Those wheels are worn.  That would need to be a $700 bike new to be worth $250 in that condition.  

Pictures don't show detail on the items like brakes, bb, crank, wheel, hub, and chainring that would give a clue. If you are not finding mid range name brand components that bike is not worth $250.

A lowest end bike is under $100.  This is picture of $300 bike new.  Assume that is a low end bike until you have evidence it is not.