Well, the actual stock replacement wires are pretty expensive like almost $120. So, if they're going by that then I don't think it's unreasonable at all. However, you may want to pick up the lesser expensive wires and give them to them to install.
I live in Detroit, I couldn't give a **** how good my car is in the "twisties."
"I could use a hundred people who don't know there is such a word as impossible."
~Henry Ford