I spotted the aformentioned car above and got rather excited. Now being brought back down to planet earth a little i've re-adjusted what is feasible on my budget (~£15k). I've spotted the below car as a very entry level car into the world of Z4M ownership.
Mileage doesn't necessarily bother me as i know from previous experience what these engines are capable of. I'm likely to drive the car a fair bit, so perhaps having a car where i feel guilty adding miles to it is a better option?
https://www.ebay.co.uk/itm/BMW-Z4-M-Coupe-3-2-S54-Straight-Six-6-Speed-Manual-LSD-FSH-2007-Personal-Reg/233191081038?hash=item364b45844e:g:5uEAAOSwZ79chSMD
I know this one has been mentioned before and if the price of £12k still stands then i'm eager - i'm a bit of a spanner junky!
https://www.autotrader.co.uk/classified/advert/201904036565149?sort=price-asc&make=BMW&postcode=bb120hr&onesearchad=Used&onesearchad=Nearly%20New&onesearchad=New&advertising-location=at_cars&model=Z4M&body-type=Coupe&radius=1500&page=1