Back on topic, the E89s are very spec-sensitive in their desirability and therefore value. The top-spec models with iDrive, extended Bluetooth / USB and MSport trim fly off the shelf, I know because I chased a couple of elusive ones before I finally bagged one, but the lower spec models sit around for weeks. I found getting a good spec manual 35i took a while, not sure if the demand for these is higher than DCT equiv but they are rarer, so I'd expect their values to hold out particularly after the new Z is out in 2017/18?