Most of the value lies in the engine, but good possibliity the car was parked due to engine trouble. The engine ID# is on the bottom next to the oilsump pan. M96 is the engine type followed by size code:
20= 2.5L 1996-1999
21= 3.2L 2000-2002
22= 2.7L 2000-2002
23= 2.7L 2003-2004
24= 3.2L 2003-2004
When you go to see it take a 24mm socket & breaker bar to turn over the engine "CLOCKWISE" only! to see if it spins smoothly with no noises. Turning counterclockwise will damage the timing chains etc. Ideally the engine should be parked at TDC prevent damage to valvesprings. Check for TDC before turning over engine, & return to TDC clockwise for storage. See photo with red pin locking crank pulley at TDC via marking hole.