He seemed quite pleased with that arrangement, and why not? Minimum fuss, no price labels to stick on everything, and good $. Good on him!
When I lived on Long Island, in the early 1970's, I had that relationship with a few of the "junktique" dealers along Merrick Rd in Western Suffolk county. It started when I told a dealer that is price was too low, and gave him more. Then word got around.