k&n oil filters are junk, stick with an acdelco filter, and dont even bother with 15000mi oil just use regular synthetic, your wallet will thank you.
and a master cylinder was under $40 for my bonne. find an autozone by you and check their prices, they will be much less than what youre seeing for some of your parts.
edit- master cylinder is 37.99 @ autozone.
door lock cylinders are 13.99 @ autozone.
door lock actuators are avail online @ autozone.com for 59.99
brake drums are 34.99 @ autozone for the good duralast ones
brake shoes are 12.99 @ autozone
ceramic brake pads are 37.99 @ autozone
brake rotors are 27.99 @ autozone for duralasts, i ve had no problems with the valuecraft ones on my bonne tho, never warped with the way i drive