Difference in cost of OEM spares

[alexcurtis]

A different question hopefully…

I am looking at buying a new car ( well second hand) and there is a mixed list of BMW Ford and a VW in there! I am being told that OEM BMW parts will be more expensive than others, I am not convinced about this as unfortunately my limited take on things is that when you get to the bespoke OEM only items they are all very expensive for what you get… and there will be a little difference for a similar item in particular between a VAG and a BMW item.

Just to clarify I am not talking about discs, pads, etc or labour costs

Thanks for your thoughts / help