I dont know the car, but a few observations...
Firstly always run a vcheck on the car, it gives you loads of extra stuff normal HPI checks etc dont give.
And on the car specifically, I wouldnt worry about the in dash flip up screen, in fact my preference is to get one without as its a ball ache getting rid of it if you want to use other tech - its going to be a decade old bit of tech anyway and look its age.
Its been debadged on the back, but also the sides so presume thats owner just doing it rather than anything like a knock. No cruise control. But heated seats.
There are three sound system options, worth checking in on that, standard, hifi and top hifi (with bass speakers etc).
Stormworks gearknob on it I think, so maybe previous owner did a little bit of tinkering across the car so see what looks non BMW and check it out.