Original Studio recordings of a Star Wars soundtrack

I bought a tour bus with a bunch of original studio recordings on old reels in the luggage bay. A couple caught my interest, most I never heard of. One is John Williams "Star Wars" "Close Encounters" -C. Gerhardt/National Phil. Orch. it is on two large reels. They are 1/4 inch Scotch magnetic reels. Any ideas where I can find out if these have any value?

garybronson, September 30, 2013; 1:04 AM