Reminds me of a recent post regarding a guy selling one of the big boomers. Rifle and box of cartridges with three empties. Prospective buyer asked seller if he only shot it three times ? Seller said "No. He was the third owner..."
On a more practical side, for the right price, might not be a bad donor to have rebarreled to something more practical like .300H&H. Should already be set up for 3.600" COAL....