M1 Carbine replacement barrels

[I.H.1989]

Muzzle erosion, or wear. The lower number, the better. 1 or 2 is good - 3 not so good, but still may shoot OK. - Bob

Thank you, Bob.

There are a few that are around 1-2. Would you happen to know what is considered a good price for them? Also, should I avoid those that have import marks on them? I've heard that sometimes they can deform the barrel. What about those with no date on them?