When it comes to watch servicing, I've never seen a bigger rip off and racket than the likes of in-house service centers for the big brands in the US. Not only do they charge you ridiculous amounts for parts that you probably do not need, but you don't even get the old parts back that have been replaced in return.
Take for example- If you brought in an Audemars Piguet, Breguet, PP or other high end watch to their respective US or NA region in-house service centers for an overhaul, one of the replacement parts on the list for service will likely be the rotor. On such watches, that rotor alone is going to cost upwards of $1,000 US. Why? Because those brands use a 22k gold weight for many of their rotor designs (as the weight of the gold makes for a more efficient winding rotor). Do you get your old rotor and gold weight back in return? You can bet not. So, you basically just gifted that brand with a nice, 22k gold weight and paid them to do so. I'd say this is almost theft...