yeah ford beats you up pretty bad, you think they would offer better prices on parts to get people to buy more from them, but then again you have all the people that don't know better and pay full price.
That is a good price for the plugs with install. The cheapest that I have been able to find them is 79.60/set at Evolution Performance. And a shop in Mississippi wanted 150 for the install alone. Talk about crazy, they were claiming 1.5 hours for the install. Hell I can do them in less time than that. I guess they have the install price bumped up because of the problems some have had with breaking the plug off on removal.