Although mine is a 2005 Corolla CE SE auto, the list price for cruise (dealer option) was $210 C$ installed. I talked them into doing for free ! The list for CC in a Matrix was $310 installed for some reason
Since the 05+ rollas are DBW now, I assume the wiring is all there and they just add a column-mounted stalk (looks like a factory piece - similar to my old Camry's CC). Maybe they have to activate the signal in the ECU after install, but there is not a lot to installing CC at the dealer anymore.