You will need to post pictures.
However from your description the rifle has been modified so it has negligible collector value. If the action has not been drilled and tapped someone could spend around $400.00 -$500.00 buying new wood and missing metal and have a $500.00 dollar rifle.
As a sporterized M1917, heck if I know. Send it off to Numrich and see what they will give you for the remaining parts.
A complete bolt has to be worth $80.00.
If I'm not shooting, I'm reloading.