Very valuable, especially the 3 original set even without the box and insert. The others less so. I am guessing, though PM me for a professional appraiser's e-mail, that the 3 original w/out box and insert would sell at auction for $1,000-$2,000, depending. I note that you are missing Supplement 4 God, Demigods and Heroes (Kuntz and Ward)! for a complete run!