Ford also wants around £200 for a single original alloy when you can buy a second hand set of 4 good ones for around £300, or less. It may be worth some money longer term for those that want standard replacement parts because they have show cars but I doubt it's worth that much now. I've got a whole shed full of standard parts and I can't be bothered to sell them because they're probably not worth very much. As I don't really need the space I'm keeping them to give them to the new owner at some point in the future should I decide to sell the car. So I don't expect you'll get much for it.
I left my std exhaust system at the Mountune dealers when I had my upgrades, don't think it's worth much and couldn't be bothered to transport it home and then let it roll around in the garage for the next ten years.