Our local WM has an okay selection. Have bought some there because the prices were so much more reasonable than the local but fabulous qs. Also I hand dye most of the time and JoAnns carries the muslin brand I use.
It is very nice to have various stores to go to. Before I lived in the country (as in "turn off the paved road, go two miles, turn at the mail box and the house is a fourth mile down the road"). I had to take whatever the one store in town had, which is why I started hand dyeing. Would go into the bigger city every couple of weeks for supplies, including quilting. Loved being in the country but love where I am just as much for other reasons.