The only partly mismatched K98 that you can generally assume hasn't been dicked with is a bolt mismatch but otherwise matching. As mentioned pics are really required. It was made at Mauser Oberndorf in 1940 so just about every part will have markings of some sort. Without seeing it if stock, bands, barreled action and bolt match it should be worth $1000 here, I see a lot of RC's going for $600 with peened swastikas and completely mismatched and Russified. Unless it is a post war Czech or East German refurb then not that high. My 2 cents.