Numrich has always been a crapshoot for me. I see Krag barrels on their site listed as used reproductions. I don't know if that is what you are looking at.

The CMP is selling brand new Criterion barrels, threaded and short chambered, drilled & tapped for rear sight and front sight dovetail cut for $209.00. This is hard to beat for a brand new barrel of known quality.

While not a Krag, I fitted one of their Criterion barrels for a 1903 with excellent results.