To estimate the price of the 2018 BMW 760 M xDrive V12 6.6L Twin Power Turbo (M Performance) Standard with 46640 km mileage, I considered the listed prices of similar cars. The 2017 BMW 760 W12 6.6L Twin Power Turbo LD with 26000 km is listed for SAR 275000, and the 2018 BMW 760 V12 6.0L Twin Power Turbo with 70000 km is listed for SAR 200000. Given that the target car is a 2018 model with lower mileage than the 2018 listed car but higher than the 2017 listed car, I estimated the price to be between these two values. Considering the condition and mileage, I adjusted the price slightly lower than the midpoint of these two listings.