Plug Change + Air and Fuel Service!?

[Dixie Design]

So I've read and heard all the horror stories about changing the plugs in trucks similar to mine. So I figured I'd probably have my plugs changed by the local dealership. I called them yesterday for an estimate and got some feedback I hadn't ever heard before.

They told me it'd be between $400 and $720 to change my plugs Usually it's about $400 including an "Air & Fuel Service" that they refuse to change the plugs without doing. I inquired about this air and fuel service and the service manager really didn't give me a straight answer on exactly what they do, said it cleans the carbon out of the air and fuel systems. I could understand on the fuel side, but what carbon build up is there on the air side? Unless they're talking about my TB or something, which I just cleaned. "Air and Fuel Service" alone is $135 alone.

Now the variant from $400 to $720 is that they said our stock plugs are prone to breaking (which I've seen and heard all over the forums) at removal. They charge an extra $40 per plug that breaks to get the "pieces" out.

All seems a little far fetched to me, a little squirrelly. I don't see how you can go in and ask for a service and it "depend" on the mechanic as to how much it costs, especially at a dealership.

If someone comes to me wanting vinyl decals or a website, I have a set price, it doesn't "depend" on who I have work on it, and if they mess up an image or something charge the customer more...

(posted this at F150online.com too, was hoping Bill or anyone else might chime in here if y'all didn't see it there )