Pathfinder

I am a lady and need a car to drive to work in the snow this winter. I found a 2000 Nissan Pathfinder with 144,000 miles. I like the way it rides; however I can feel something on the floor when I ride. I wonder if this is the way it should feel or if it could be a bad tranny. It is $5,000. Is this worth a try?

Thanks!