Any 455 barrel -- sporter or varmint weight -- will work with any 455 action, and so such a barrel has value to a CZ 455 owner. I bought a .22LR CZ 455 Varmint barrel last summer on EE for about $150 and I sold a 455 American barrel in .22LR for $125 or so (I don't recall the exact figures but these should be close).