Not sure how he had the same wheel on an E36 and an E46 M3. The correct offset for an E46 definitely won't fit on an E36. I had an E36 and E46 factory wheels had a bad offset for the E36. The offset for an E46 is also wrong for an E90.
That being said, without knowing the offset, it's good not to buy.
A good offset for a 19" wheel on an E90 that is not aggressive and doesn't require a fender roll is 19x8.5 front, 19x9.5 rear both with +35.
You should be able to fit a 235/35 up front and a 265/30 in the rear.
Depending on the tire you can get some 275/30 tires to fit.
All this with no rolling of the fenders and not rubbing.
I have a sedan, but a coupe should be similar, if that is what you have.
I'm running Foregestar F14s in the fitment I described with 235/35 up front and a 275/30 in the rear. I'm running Falkan 722 all weather high performance. I have sport suspension.
No issues at all, even with five in the car.