about 200 id say took few months to get all parts toghter an work out how it worked, but once had all parts its easy and easy to bypass the bcm
parts i bought:
calais body loom
and door looms
2 bran new regs front
2 secondhand rear regs
second hand swichers
auto up off ebay
and door trims i just used looms for the plugs witch was easyest op for me.