A good dealer will stock the parts for their detectors that most people need so they will be able to take care of their customers. I see so many looking for the simple parts like coil bolts and washers and they put ads out because their dealer don't stock the parts as the real money is in the detectors them self's, not the parts so they don't stock the parts.
I am a dealer ( may not be for long for health reasons) and believe I sold more parts than detectors as people needed them, but couldn't stock all the parts, but knew which parts where needed the most, so I always had extra alkaline packs for the Sovereigns and the Explorers, had some extra plastic arm cuffs for the Explorer and a lot of coil bolts and washers plus several of the lower shaft too as these were needed parts. Some I had to order in too as they were parts that wasn't needed more than 1 every year.
This is what makes you great dealer Joe as I notice you stock the parts and go out of your way to make the customer happy.