My S reg fiesta has got to be scrapped. Too much needs doing to pass the MOT.

My local scrappy will give me a good price for the scrap and they don't break the vehicle for parts so they don't care what I take off of it first.

I fitted a brand new set of locks a couple of years ago and I figure that I will harvest them and put them on ebay but I'm wondering about the immobiliser electronics.

I am happy to just sell the locks but I reckon if I can hand over locks plus the bits which would make the new car accept my existing keys, it would be worth more.

Is it doable? what bits would I need to harvest?

Thanks.