James Jones lists this model at 21 lb. plus 3 lb. for the dampers. Don't know what the tristander and case would weigh but Bob's probably pretty much spot on on shipping weight. I'd suspect carrying weight for jams and festivals would be 30-31 lb. for the first hundred yards and increase logarithmically after that.
That said, this is a beautiful dulcimer and I'd think it's worth every penny of the asking price. Just wish I could justify the purchase but I doubt my marriage would stand it.