Yeah the instructor only does teaching partime usually at cost, the biggest problem is they are reselling the equipment at cost + shipping so it definitely prohibits the movement of the product in the retail establishment. Problem we have is the instructors friends are quite often on the same boat as divers from the other shops around here wearing the same equipment, when they talk it appears we're ripping them off. We've have ceased buying anything from the manufacturer since they seem to want to continue to sell directly to instructors as well we've alerted others in the area of the practice.
To answer other questions, yes the instructor has a business license, however we all know they give them out. They dont have a store front they work out of their home, dont do air fills, or repairs, no store front to hold regular hours, the home is not in a business zoned area, and they dont run a training or travel program.
Knowing the attitude given from the owner of the manufaturer, probably not surprised if he's selling it to instructors all over, they openly admitted an example in Texas someplace.
Thanks for your replies.