I purchased from KellyCo back in the 80's. In fact, I believe they once offered dealerships and I had one. As I recall, I just got the dealership and KellyCo decided to drop all dealerships.
While I would say back then they had about the best deal, I had problems with service. I once returned a set of headphones and never received a replacement or refund. I wrote to them a couple of times and they said they had no record of my return.
I also purchased a Pulse Inductive detector from them and when I tried to order extra coils, etc., they wouldn't even respond.
However, that was nearly 20 years ago and things change (hopefully).