I was considering the same thing before buying my GT. Mostly because it was so hard to find one.
My dad has a 328xi sedan and he loves how it drives. With the exception of the run flats of course. But he says he constantly regrets being a responsible adult and not getting the 335.
And one thing I notice is how often it seems to be in the shop.
Finally, it always amuses me when people point out the original price of a used car. If the car is being sold for 60% what it sold for 3 years ago - is it really that much of a bargain or is there a reason it lost nearly half its value that quickly?
You could get a 1998 7 series for about 5% of what it sold for new. It doesn't mean you should.