Winchester Model 70 Pre 64 Super Grade in .250 3000 Savage|Winchester Rifles|Forum|Winchester Collector

I can’t answer your question of putting a “value” on the referenced extraordinary rifle.  Yet some comments. 

The Blue Book at its best, most accurate range for common model guns. The more extraordinary/exotic, the less well to provide accurate info or, as you note, any info at all. Classically too, in the pre Internet connected world, a part of attained value very much related to getting ‘the word’ to the especially interested buyers.  Nowadays, particularly in Internet auction context, the deep pockets crowd present a wild card. Such particularly significant when these folks presented in the numbers observable bidding today. Such diversity, results as expressed in attained prices!  A particular point being, the actual “value” of a gun (or widget) today, much dependent on the scope of ‘audience’ reach, determined by the sale “forum”. Beyond personal direct marketing, such most commonly expressed as, shops, shows, and Internet.

For decades, as these first several, more with nuanced price achieved ‘flavors’.  Now with Internet as gorilla in the parlor, a whole new ball game.  Definitely “market-influential” to say the least. Still, the phenomena of “real world” pricing as many instances ‘yet separate’.  Internet prices to be “considered” in pricing evaluations particularly in context of rare, unusual, exotic guns (pick your descriptor)!  But to my opinion – and others will disagree – we have something of a dual valuation structure.  Internet pricing as “wildcard” but almost assuredly greater than “other” and those sort of ‘tidal influences’, with their definite pricing effect overall. 

In Winchester land, the gathering of eagles here presenting expertise about the best resulting evaluations to be had… Within ‘reason’.  Wild weather Internet auctions “attained prices”, moving to ‘crystal balls’; IFR flight rules without reliable instruments! 

All this dialog on my part, boiling down to original postulations.  Value guides become unreliable/incomplete concerning rare guns with multiple value vectors.  Your request here for instance, postulating. pre 64 + Super Grade + less common chambering + approaching 100% ‘as new’ + ‘ruffles & flourishes’ accessories (boxing & literature)!  Your approach, coming to this sort of Forum, as best possible resource! Congratulations & good luck!  

Here, just my take.

Best & Stay Safe!

John