The guys are right on the value. About $150 is in the ballpark. This one would lend itself well to being put back together if the barrel hasn't been cut (I can't tell from these photos). Like I told another fellow, you couldn't make it into a faked original. but it would sure look nice on the wall or at the shooting range. If you built model cars or planes as a kid, this would be a fun big-boy or big-girl winter project. The required parts are available all over the place.
Welcome to the forum! Drop a post if you decide to do anything with that rifle.
IMHO, someone has been playing games. K.98k rifles were not marked "K 98" they were marked "Mod. 98" and they had no recessed ring at the front of the receiver. I don't know the origin of that one, but in any case, it is nothing more than a hunting rifle now.