> But there's a whole lot of folks who can't really justify paying $200 for a plumber service call to replace a $20 part in the toilet tank.

You guys are hilarious. Where are you going to get such cheap plumbers?

I just had a plumber out for nontrivial work. Definitely over $200 per hour!

(Although I will say: If you have CPVC pipes, best to call a plumber and tell them up front you have CPVC and let them take the liability...)