Just by writing a 'fanciful' advert does not make a car worth more money. This is by far the most expensive 2010 30i on the market, for the mileage, and many of the OP's selling 'highlights' are not strictly true.
The 'comprehensive service history' looks to have a four year gap between 2018 and 2022. Then no mention of a service since 2023.
'Bi-xenon headlamps' are not an option on any E89, they ALL came with them as standard.
There is nothing 'rare' about a manual 30i.
The M-sport package was common to all M-sport cars. It was a spec.
The 'low mileage' is not really low is it? 116,000 miles could never be considered low, but for a 16 year old car it's still 7,250 miles a year, every year.
Sorry but trying to market the car as something special with an inflated price, when it isn't, gets my attention.
I presume it is a very nice car, but some of the hype is a bit much TBH.