Wtf202

Im looking at buying this 2002 s430 when i first looked at the car the rear was like 6 inches raised in the rear and the front was slammed. after the car was turned on (maybe he pushed the airmatic button) it almost leveled back out but you could still tell a difference. when i drove it the suspension didnt seem right like it was too bouncy, almost as if you had cut springs or something. any idea on what this could be? (the car was sitting for about 3 months) verything else is good car runs good drives good this is one of 2 issues with the car that i need some info on