The valve cover gasket ran me $500 on my 325. Not sure about the other ones but I know the oil pan gasket will be pricy in terms of labor. The front subframe needs to be dropped. The oil filer housing gasket is super easy to replace. You may want to do that yourself. The rear main seal is tricky. You might want to leave that alone if its not leaking badly.
'06 Arctic Metallic 325i | Sport Package | 6MT | Dinan Stage III suspension | Dinan exhaust | 330i manifold swap! Click here!
| Active Autowerke tune | 135i Brake Calipers | Deiselboost caliper brackets | E46 M3 front rotors