Hi, Gunfighter,
Do you mean a German K98k rifle, or just a Model 1898 Mauser. A K98k, matching, with all original markings can easily run over $400. Most of these are GI "bringback" war souvenirs.
But K98k's that were seized by the Yugoslavs, with Nazi markings obliterated and bolts not matching are on the market for about $80. Czech-made VZ (Model) 24 rifles (also 1898 action) are available for $70 or less. Turkish rifles with 1898 actions are also on the market for around $50. All of these have seen heavy use and some barrels are in pretty bad shape. All I have seen headspaced to spec (even with mismatched bolts) and were safe to fire.
Swedish rifles are very nice, but are the older Mauser action, which is not as strong as the 1898 action. But Sweden did not fight a war, and the vast majority of these rifles are in excellent condition, with good bores.
Jim