[V8]

Apologies if this is the wrong place for this...

Want to trade in my 2013 M6 coupe a year early (I'm 2 years into a 3 year lease).

The dealership I use gave me an eye-wateringly bad quote for the trade in value... Any of you seasoned guys out there have any ideas or suggestions? Trying to get into an X5M to fit a family expansion.

Thanks in advance for any advice.