As a guess, you could probably get it repaired for less than 550, although much depends on what's actually wrong with the shutter.
David Odess is the usual recommendation but there are others, since you are "out west" Samy's in L.A. might be a good alternative for slightly less transit time.
FWIW I sent a 80 C T* to David for a CLA, he got it back to me in reasonable time, and it has worked well ever since. His basic CLA price is quoted on his website at $195 + parts, if that helps.