GTS coal price was accurate from when I purchased. Because of neighbors complaining, they really don't want any 'on-site' sales unless you're in a real jam. But they deliver pretty promptly.
Also, compared to last year, the quality of the coal has improved. And they fixed the oiling issue they had when they got started.
I have also found good product at Dennis Coal in Fabius. They cost more but they do have a regular retail set-up, regular hours, and scales.