I am not sure about Jetcat, but our manufacturers offer margins in the area of 15 to 20%.
If I'd have to rely on the dealership to make my living, I'd be starving to death. I didn't make a single $ of salary for myself this year.

Being a dealer in the hobby activity is unbelievably tricky. On such a thin margin, goods turnover is vital. You leave an item too long in the shop? You loose money on it.