Nope, no pissing match intended, or wanted man.
But, as someone who has done more tire work than *most* folks on here (notice most), I never charged more to dismount, repair, mount, or balance a 19" tire than others. I would think modern tire machines and balancers should handle a 19" just as easily as any you mentioned. Maybe we were undercharging people and leaving some profit on the table.
If your shop has pricing policies different than that, and your shop and the paying customer are happy, that's cool, I was just asking what was involved in a $45-$50 repair. I thought maybe he needed a lot of bead cleaning, or a new bolt-in stem, or stick-on weights, or who knows what else.
In full disclosure, our shop was in a smaller city, with much lower overhead and employees with smaller paychecks.
I've seen the countless "+1 for Derek" threads here, so you obviously must be doing things right. I know firsthand that no matter what your work ethics and policies are, eventually a bad situation pops up, and kudos for resolving this one.
BTW, no jab intended about the edits. Shows maturity that a lot of folks wouldn't have had. I just enjoy reading the before and after edited posts.