20 Gal. glass jug w/ ceramic stopper

20 Gal. jug with a ceramic stopper, stopper has some chips. Has 1948 on the bottom with some other letters that we are working on. It's a tall jug. I have a picture of this as well if needed. I am looking for an estimate on price range that it is worth for my father-in-law. He found it in a tractor shed on his property.