drice561 - do you have any other suggestions or are you perhaps willing to make an offer? Can you point us to another Apex .300 Blackout barrel for sale?
Last rifle Apex barrel I bought cost me $125, shipped price. It was new in package, never opened. As with all Apex barrels, because the gun was discontinued a few years back, they are like needles in hay stacks.
However, I don’t believe the 300blk ever really took off in any single shot variants like it did in bolt platforms, and more so in AR platforms, so I don’t really understand the “rarity” price.