I have a really nice B78 with box, manual, sling swivels and R&B's. Shoots great and has a Leupold Vari X iii 6.5-20 AO scope. Ball park on the price? it has one small ding in the clear coat. Thanks.
First if all-you'll get more for the oackage sold seperately than together.
Sell the scope separate from the rifle, box ,and mounts.
Also the Octagon barrels are worth a bit more than the full round
Wood figure varies quite a bit. My first B-78 was an Octagon 22-250 I bought brand new in 1983 and it had feather crotch grain in both sides of the butt. I have seen $10K Diana grade Superposed shotguns with plainer wood. Mine was as good as I have ever seen since but I have seen many B-78s with high grade wood just as nice.
From what I have seen looking at many over the years,the wood on a B-78 would have to be pretty darn opulent to command a premium over other B-78s on the market.
Condition is most important and for the shooter- so is round count.
If your rifle has an Octagon barrel , a sane selling price would be $1,200 if it looks new. The scope is worth $350- $400