Just when I think I have a good handle on used prices I come across these two during a lunchtime browse of AT:
This 2009 E85 2.0 on 75k miles is up for £10,750
http://www.autotrader.co.uk/classified/advert/201604072718862?model=z4&radius=1500&onesearchad=used%2Cnearlynew&postcode=la158qq&sort=priceasc&page=2&search-target=usedcars&maximum-age=up_to_7_years_old&make=bmw&logcode=p
The very next advert is this 2010 E89 23i on 70k miles up for the same price £10,750
http://www.autotrader.co.uk/classified/advert/201603061709572?make=bmw&maximum-age=up_to_7_years_old&onesearchad=used%2Cnearlynew&model=z4&postcode=la158qq&radius=1500&page=2&sort=priceasc&search-target=usedcars&logcode=p
This 2009 E85 2.0 on 75k miles is up for £10,750
http://www.autotrader.co.uk/classified/advert/201604072718862?model=z4&radius=1500&onesearchad=used%2Cnearlynew&postcode=la158qq&sort=priceasc&page=2&search-target=usedcars&maximum-age=up_to_7_years_old&make=bmw&logcode=p
The very next advert is this 2010 E89 23i on 70k miles up for the same price £10,750
http://www.autotrader.co.uk/classified/advert/201603061709572?make=bmw&maximum-age=up_to_7_years_old&onesearchad=used%2Cnearlynew&model=z4&postcode=la158qq&radius=1500&page=2&sort=priceasc&search-target=usedcars&logcode=p
