Click wheel totally inoperable.

My ipod nano 3rd gen will power on and respond to the hold button. I have reset it from the computer but it will not reset from the scroll wheel no matter what I do. Everything except the scroll wheel seems to be fine so I sent it off to get it get it looked at at a recommended website thinking it shouldn't cost much since I thought it would just be the scroll wheel. They said it would be $150 and that it needed a new logic and face plate. I was quite surprised at both since its face plate was fine and I figured the logic board was fine too since only the scroll wheel seems to not work. Does it sound like the scroll wheel is the only problem and the site was just trying to make some $, or should I replace it all?