I bought my Park Ave used with 40K miles. This car is by far the best full size car I have ever owned. It is reliable as it is comfortable. In the past 60K miles, I have not had to replace anything major on the car. The 3.8 L engine is easy on gas and provides adequate power in typical driving conditions. The only negative I have experienced with the car is that the front brakes require above average maintenance. Overall, a small price to pay. The trunk space exceeds the available storage of a Pathfinder or Explorer (with the second row seat up). This is the vehicle of choice for my family vacations. My young son fittingly calls our Park Ave "The Comfy Car".
Quiet ride, excellent fuel economy, comfortable seating for long trips.
I wish Buick would bring the design back. This one won't last forever.