You say looks new. Be that it may be, it may have been sent back for additional barrels and the matching number set lost in some way. Might be the reason for its being sold.
I don't see this as a problem if you wish to shoot it and it satisfies you. BUT---I would discuss this with the seller and if it proves to be unsatisfactory as a shooter, then it can be returned for full refund.
As a set of original barrels, in the same condition as the rest of the gun, is worth half of a gun's value, I would think that this one should be discounted by, perhaps, 1/3rd.
If the price is good, then it may be a great bargain.
Best,
John
