I've been there a couple times, didn't buy anything, didn't need anything. He ooogled my CB a bit and then let me roam the aisles shelves yard checking out their stuff. If you are roaming around mid Michigan and need something it is worth a stop. Mason is on the Dexter Trail, one of the nicest MC rides round these parts.
I've also been to cycle recycle in Indianapolis. Their website shows only new parts, but they had boatloads of used parts as well. I think they have a yard as well, at a second location.