Any book is a guideline, nothing more. A gun is "worth" what a buyer and seller agree it is worth. Nobody else's opinion matters at all. If somebody buys that 41 for $6400, or $64,000, then that is what it is worth to that buyer. Obviously the gun is "worth" $6400 to the seller. Whether or not...
Favorite deer cartridge, hands down, is 7x57. Probably my favorite rifle is my M77R MkII 7x57. It has a Timney trigger and sear and wears a Leupold 2-7x33, which is also my favorite big game riflescope. That trigger breaks around a pound, and the bullet goes right to the crosswire every time...