As others have said it'd very much depend on the mill, it's all well and good quoting crankandstein prices for what is effectively a set of rollers with no hopper, no motor, etc etc, when I look at the crankandstein and then the price of actually getting it to a working state 250 is not too far off.
I'd be in on the uncrushed grain, but the mill is my issue, 250 does not seem so far off if it'll plug in and go with no extra work.