I have not been following 1917 Enfield prices. All original must be getting rare if they are going that high!
My dad bought one after WWII for $7.00, a friend borrowed it a short time later and liked it so much that my dad gave it to him. My dad sent in another $7.00 and the next one was unfired in the cosmoline. He had that one sporterized right away and I still have it.