$50 sounds like a good deal. I have a pair and used them on the 40km Garbaldi Neve Traverse while carrying a heavy pack. They are a bit of a chore to turn compared to newer shaped, pattern based skis like the Alpina Cross Terrain or the Voile Vector BC (American wood in this board ) of which I have both. I really don't use my 10th mountains any more but they are a great ski, easy to use, and especially fun in Spring corn. You can't go wrong for $50 if there is no horrible, visible damage. Even if they have been mounted before that is no biggy.
I ski them all with 3-pins by the way...