If it shoots it's worth it, and, youll find someone who can i.d. the scope mount and maybe hook ya up. They used to be that price retail w/a mismatched bolt in good condition, but, today, I wouldn't have a problem with it at all.
Rebuilt a Savage of my own part of whose stock had caught fire somewhere...
A quick and easy way to tell the difference is the location of the rear sight. If it's back at the bolt handle it's probably a No4. In front of the receiver and on the barrel it's probably a #1.
I'm probably not going to mention anything that you don't already know but just in case:
1. Check the head space
2. Check the bore - Quick and easy check is to place a .303 bullet in the muzzle and see how far in it goes. I've seen some that the bullet would almost fall through.
3. Check the rear locking lugs and make sure they're in good shape.
also note some ammo uses a smaller bullet than others, so they might fail the bullet in muzzle test.
bought some S&B awhile back & i couldn't group better than the size of a beachball. when i did the bullet test, they dropped all the way to the brass. i have federal champion's & privi partisian's & they however show plenty of life left & shoot much tighter.
All I've had today is like 6 gummi bears & some scotch