Decent price IMO for the condition and the fact that it's a Grade II.
The possibility of a 'salt wood' stock would concern me however.
The salt wood was all high(er) grade claro walnut.
Simply taking the bbl'd action out of the wood and examining it will tell you then and there if it is or not.
The metal be either rusted/ pitted from the salt wood contact and still have live rust working it's way into it.
..or it may have been 'saved' from prior damage by refinishing the rusted and pitted under the wood metal.
Takes quite a bit of polishing either by hand or power and then the bbl;d action and all the effected small parts involved in the repolish are reblued.
The outward uneffected surfaces are not touched,,they just remain pristine if so and go thru the hot salt blue and come out looking the same.
If anything any blue worn edges are now back to 'new'.
A lot of work and this usually leaves evidence behind of itself in the way of some of the deeper pits still being there. Or pitting still in hard to reach areas, ect. All depends on the person doing the work and how much time and effort they want to put in.
Also the stock, if the orig salt wood, will usually be heavily coated in the inletting with one of many magic sealers that some believe will prevent the rusting from happening again.
Many will be glass bedded in an attempt to prevent the salt wood from touching the metal from that point forward.
AFAIK, there isn't any sealer/coating that'll help. One might delay the effects for a while, but you can be sure the plain old rock salt/ road salt that they used to cure the wood and is now still imbedded into the wood as it drove the woods natural moisture from it to cure,,it's still there.
It draws more moisture from the air like salt on your car and rust continues.
Pulling the butt plate screws is another way to usually see the problem. Some of them just snap off as they are salt eaten down to near nothing in dia.
Others do come out but covered with live rust.
Here's a link to Arts Gun Shop. They do near exclusive Browning repair and restoration.
Under the 'Videos' scroll down to 'Restoration of a salt wood gun'.
You get a good look at the mess they are inside from the wood on an O/U in this instance,,,and what his opinion of what to do with the wood.
Art's Gun and Sports Shop
If the LGS isn't willing to simply remove a screw and drop the bbl'd action out of the wood to take a look for a well known & expensive to make it all good again problem that's been around for 50yrs,,,then I suspect the price is a very good one for a very good reason. For their unwillingness to turn a screw on the gun to inspect,,I'd walk away from it.
If they do TD the rifle and all is well,,sounds like a nice deal as I said.
Browning did for quite awhile restock salt wood guns as a matter of customer service. Their Bad,,they took care of it.
But no more AFAIK,,you are into it on your own now.