Lot's of view and no comments. Priced to high? Not the season? What?
Might be priced a little high for what it is. First it is a nice buggy, but.....its an air cooled type1, beam car. You mentioned suspension upgrades but most in the $14,000 and up have A arms, and full length KINGS or Fox shocks and probably By-passes (not all) and either a type4 or a small water pumper.
Again I only responded because you asked. I think its a nice entry car and would be great family fun.
Maybe try running an ad on Race-Dezert classifieds under pre-runners or sand cars. I bet you will get much more action over there. Good luck with your sale!