M6 (f13) Running costs/buying guide

[Z4MCSL]

Im exploring a few options now that we can start test driving cars again and the M6 has crept into the list.

I am interested in what the main issues are and the related costs?

Are there any specific weak points or issues that should be fixed or expected to go wrong and budgeted for?

Thanks

[Z4MCSL]

im not planning on buying a mapped or moded car (possibly open to an aftermarket exahus) as would want any of that to be done by me.

looking to buy on fsh and good history etc

Interested if there are any bug ticket items that go e.g. clutch, brakes, any engine issues?