Well, that makes me feel better to hear that it's not completely out of the ballpark. My head's just been reeling since I heard the quote!
I suspect that my repair may be more complex because it hasn't been serviced in so long, and will need a fair amount of precise adjustment to get it back into shape. I don't mind paying for the cleaning, either, because it has been so long, and it's a heck of a lot easier for him to clean the tight bits when the flute is in pieces.
My flute is a Miyazawa, so it's nice to know that sending back to them is an option. I did, however, enjoy having the technician watch how my hands and flute interact to better understand how I can play for more extended periods without pain. That's the kind of service one can't get by sending the instrument off, and I do appreciate that.
So... time to cut back on the expensive fizzy drinks and nice cheese for a while, and to sell the old Gemeinhardt. Sticker price heart attack averted, thank you.