That is one great looking 5er! It's been meticullously detailed, from what i can see in the photos. Interior and exterior have been cleaned and waxed.. the engine bay has been cleaned and all black plastic has been treated... someone took a few hours to make this car look great.
Take her straight to your mechanic and have EVERYTHING checked.
look for leaks...
worn suspension parts...
evidence of bodywork...
do a leakdown test...
and take a close look at those records and CARFAX.
Let us know how your test drive and inspection turn out...
1994 540ia|Oxford Green Metallic|Lemforder|KYB in H&R|18" OE Staggered M-Parallel with Pirelli P-Zero