The seller is clueless.. just trying to get more money than the car is worth!
Note in the ad, seller describes the engine as a and I quote " shattering performance from the 5.0 v10 power plant "
"full BMW main dealer & specialist service history to 3572k" - this would be fine if it was a normal daily.. but it's not, it's covered 5k miles since the last service and I wouldn't expect that to have been serviced every 2 years minimum and if average mileage is contributing to anything, its gone nearly 5 years without one!
A load of rubbish if you ask me!