Hondo, there is a boxed arsenal/depot inspection stamp just forward of the magazine cutoff. Can't be positive but it looks like [RIA/EB]. i doubt the rifle was given a total rebuild due to the finish of the metal parts being consistent with an original.
I do think the stock may have been refinished, possibly by a civilian owner. Some of the inspection marks look a little faint, indicating a sanding either before it was placed in govt storage or afterwards.
Overall the rifle does not look bad.
If this guy is close to you try and go over to see him. Bring cash - Cash speaks loudly.
As far as the price is concerned by all means negotiate the best deal you can. But keep in mind while a better piece MIGHT be just over the hill at the next gun show there's an equal or better chance that its not. You can burn thru a lot of bucks just driving around looking.
Good luck and let us know how you make out - the seller seems motivated and flexible.
Regards,
Jim