I would not buy it if you feel tight financially. There will be added expenses very likely equal to the purchase price in the first two yrs/ 25K miles.
94 530i sold (That was difficult for me)
01 530i >144,500+ miles SOLD
06 330XI winter's especially fun drive (SOLD)
10 M3 Sedan (sweet)
13 Nissan GT-R Black Edition
14 Porsche Cayenne Platinum Diesel