I have a couple general questions you can ask. I assure there is more knowledgable people that can add to this list.
Are you the original owner? If not how many before and their round count?
Was it ever in a smiths for repairs, what was done to it?
Why are they selling it?
How did it shoot for them?
Condition of the barrel?
Condition of the crown of the barrel too?
General appearance of the rifle. Knicks, scratches, cracks if any
Will you have a chance to see how it shoots?
That's all that comes to mind
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