C5/C6 clutch life & change costs

[woodsy99]

I’m currently searching for a manual C6 or possibly C5 and before taking the plunge it would be very useful to have some guidance on the average life of a clutch (used for a normally driven car with no track days etc) and also the cost of getting a Chevy specialist to fit a new clutch (and maybe slave cylinder + flywheel?).
Would appreciate any views on this

Thanks, Nick