I bought a supply of non-resistor Bosch plugs from Napa a couple years ago for $1.07 each. I admit I've had practice, but I could easily change all 6 in 5 minutes, while wearing a white tuxedo. Absolutely the easiest plug change of any engine I have ever seen.

Found a separated rear tranny mount the other day. Wanted to fix it fast, so I called the dealer for the part price. $240. Fastlane has it for $8.
Yes, it's Chinese steel and rubber, but 30 times the price for the German stuff?

DG