BMW M4 GTS Residual Valuations

[M4HUH]

Hello

Can anyone point me in the direction to find the best place I can get a residual value on an M4 GTS 2016 please?

Thanks in advance

[BFleming]

Very mileage dependent. There are 2 on Autotrader, £76k / 11k miles, or £90k / 3k miles. Hard car to price as there are only 30 in the UK.