There is a cutaway Mauser in the current RIA auction, in a lot with another pistol.
A combined lot indicates something "they" think is going to be a tough sell or low value.
You may want to look at it, I don't have the number, it may take you a while to find it.
IMO the value may be half of what you think- but then I'm always wrong about prices; except for the stuff I buy.