BMW Li 730 BMW is very clean for the appropriate exchange

As God wills, praise be to God. I am looking for a suitable car replacement. The conditions are cleanliness, good engine and chassis. My car is a 2012 BMW 730 Li (long wheelbase) Saudi specification, top model, 6 cylinder, naturally aspirated (no turbo), front and rear monitors, sensors, camera, side curtains, fingerprint sensor, sunroof, speed limiter, steering wheel controls, smart entry, and all known BMW features. I need an economical type, available and cheap spare parts, fuel consumption is about 1000 kilometers per full tank. Saudi made, current mileage is 390 thousand, German specs are acceptable. Engine and transmission are good, I need body, glass, and interior everything must be in good condition and under inspection. It has passed inspection and registration renewed, tires are in good condition. Air conditioning works perfectly, As God wills. And the condition from bumper to bumper. The car is solid, no noises, nothing detected during inspection. Location: Al-Dhahran