RE: 8mm mauser
It depends alot on the model of mauser and where it is from. A 98-09 Argentine mauser with numbers matching is very good. The yugoslavian mausers aren't quite as sought after but they are much more available and cost less. It would be best if the numbers on the bolt, reciever, stock, barrel, and floorplate all matched. After the war some were just thrown together using a bolt from one gun, reciever from another, stuck from another, etc. If this is the case, the headspace may be so far out of spec that is unsafe to shoot. In either case you should have it checked by a competent gunsmith first. As for value, you can get a #'s matching K98 Mauser from mitchells mausers for $499. This also includes complete field kit just like they were issued with. You get cleaning kit, bayonet, sling, manual, etc. That's a pretty good bargain. The 8mm will take any animal you want as long as you don;t stretch the range to much. Lots of cheap surplus ammo for practice. In my opinion you should hanload for good quality hunting rounds. Hope I was of some help and good luck on your purchase.