I try to avoid buying things from the dealer. I usually shop around before I go to the dealer. The vss I purchased last week for example. I looked at different prices from autozone, pep boys, napa, as well as ford. Ford, ironically was a little cheaper. And, after ordering the piece, I acquired it next day.
Battery? I went to Advance for that. $89 seems a little much for a battery. Plus, with what you get...I doubt I would have gone to the dealer for batt.