If it is indeed original,and unfired, then I'd say at least $500.00 minumun,(probably more),it could also have been rebuilt/refinished somewhere along the way, The germans were always short of small-arms of all kinds,and everything they had got used, Yours however, could be the exception to the rule, look it over carefully, are any import marks present? (these may be small, often close to the muzzle)Find a copy of Ludwig Olsen's book:Mauser Bolt Rifles, lots of info, good,clear photo's can often be found in local libaray, Can you post photo's of it? very hard to comment on it without seeing it, Also, other countrys (Czechoslovakia,Yugoslavia) produced these AFTER the war using battlefield pickups, and rebuilding these,look for the mark "Preduzece 44" on left side of receiver,If that's there, then it's a yugo rebuild,Olsen's book would be a big help to you,as it shows a variety of these rebuilds ( most are dead ringers for a 98k)