This is the problem with most automotive-related service establishments - the upsell. I can do a synthetic oil change on any one of my vehicles in my garage for around $36, and inspect everything else myself. I prefer to avoid the wear & tear of having someone plundering under the hood every time I get an oil change. Removing the air filter is a particularly tricky thing on the Canyon, and I can see where breakage could occur at the hand of a ham-fisted oil change tech. I vacuum & dust the interiors every weekend, and nobody is touching my paint with a filthy wash mitt and an old towel.
Its the same situation with getting a clear bra installed. Nobody will just do the front bumper and 1/4 hood. They throw in fenders, mirrors, door handle cups, etc. at a 'package price', which ends up being $999. No thanks...I'll just get a tube of touch-up paint.
Don't mean to appear cheap, because when there's a legitimate need, I have no problem forking it over. I know there needs to be profit built-in for these places to remain afloat, but the add-ons need to be of real value to me, or I'm not paying for them.