Last week I contacted a BMW dealer for a potential p/x of my Z4MC against an E92 M3. After he offered me scrap value for the car, I asked the salesman to justify his p/x value. He sent me a screenshot of his "guide":
So according to his "guide" a Z4MC with only 20,000 miles is worth just over £15k retail. Lets gloss over the fact BMW are trying to sell a Z4MC with 68,000 miles for £21k - http://usedcars.bmw.co.uk/M/3.2-M/Leicester/1829540-605411184-3497160.aspx?srcmdc=se_na_re_
So according to his "guide" a Z4MC with only 20,000 miles is worth just over £15k retail. Lets gloss over the fact BMW are trying to sell a Z4MC with 68,000 miles for £21k - http://usedcars.bmw.co.uk/M/3.2-M/Leicester/1829540-605411184-3497160.aspx?srcmdc=se_na_re_