Hello! For all the Winchester fans out there... Im wondering what dictates the price of one of these rifles? Other than the obvious condition of the firearm.... I have seen them sell from $400 up to thousands? I have read that the number of ribs on the slide can have something to do with value? Serial number of the one in question is 1938xx and is 90%ish condition. They seem like really well put together rifles. Any feed back from someone who know these rifles would be great!