If you have any mechanic skills at all you could just change the oil yourself and check all the most important bolts for torque and then take it to the dealer and tell them all it needs is a valve check. Chances are most of the cost is in labor so if you do the oil change and bolt check yourself your saveing them time which means you save $$$$
Thats just what i would do but if your not comfortable working on the engine its prolly best to just pay the money
