Dennis welcome to irv2 and the Newmar Forum.
Have owned a 99 MA it was a well made coach by Newmar. What chassis are we talking about.
If its the Ford chassis you will have to check the springs and ride height to ground measure from the seam at floor level to ground near your tires. The coach is heavy and the Fords had a problem supporting the coach body.
All is not lost a leaf spring added to all four tire locations will solve the problem. A good spring company can do the job. Cost about $1000 with alinement front end. I had this done for a 98KS, the MA I installed Air-Lift air bags myself. Both jobs were same in cost, bags just gave me more control of coach ride heights.
If its a Ford just check with owner he may have already done something.
The price looks good must have all the options.
You are at the right place for answers you will have a coach to be proud of like the rest of us.