Buying the basic spec car then adding after market the equivalent of factory options you would otherwise have ordered, may be a way to keeping costs down. This is particularly true with paint finishes on wheels, trim etc. Here an often superior finish can be had for as little as 10% of MMC price.
Examples: M3W front wheels shot blasted then powder coated metallic silver with laquer finish £80 (MMC price over £1000)
Roadster front grill, overrriders and headlamp rims powder coated silk black £70 (Likely MMC price £800)
Roadster ARV6 headlamps with LED DRL's £50/pair - goodness knows what MMC would have charged.
Oh and yes I am a Yorkshireman in exile