I have 2 sets of "big" planner boards. Both are wood constructed versions. One, I believe, is a home made version. The other, if my mind serves me correctly, is a tru-trac set. Both are in good working condition. Asking $50/set OBO. Would rather not ship these due to the fact I would have to pull them apart, but it is possible. Becasue of this I will help with delivery.
Newer plastic models sell for around $75-$100 per one.