If you could put proper forend wood on it id still bet 450 to 500 these days easy. Seen lots of no5 with no bayonet lug still go for more than you'd think.
But, locating wood thats reasonable....
You would also have to replace the flash hider as the bayo lug has been cut off.
IMHO, unless you have that stuff on hand, it's going to cost you appx $350 or more, by the time the parts arrive.
It's hard to tell from your pics what else has been "modified"
Likely a complete stock set would be in order so likely over $400 if you can do the work yourself.
As it is, I personally wouldn't pay more than $300 for that rifle, if the bore is excellent and all stamped numbers match.
That rifle is dated 1945 so the fore end shouldn't have a metal reinforcing cap.
If you can find a cut down No4 stock, with enough wood in front of the ferrule, you may be able to duplicate an original. Still, without a proper flash hider, it's not worth doing IMHO.
