Depends on its condition and current form. Sporters go for $50-300 depending on exactly wehat they are, some are collectible, most aren't. Military ones go for a lot more, say $200-$9,000 (think mint Lonbranch 4T with full original kit all matching).
Without pics we can't really guess it. We need pictures of the right and left butt socket, left receiver wall and the knox form as well as full rifle pics then we can tell ya what its worth.