There was a red Trek 970 ZX with a rigid fork listed locally for $250. I assume it sold as the ad got deleted, but then it showed up in a different city for
$400 and hasn't sold yet. It being the largest frame size helps the value of that one, as well as the rigid fork, but not sure about the new price.
Since yours has a suspension fork, and a more common size, I'd say anywhere between $200 to $300 in the current pandemic market.