I agree but there's always potential problems.
1. Do they have any blemishes after so many years of storage?
2. I doubt they are worth as much as Green Mountain barrel blanks.
3. And we don't know how many there are or if there are any specialty calibers that have higher demand.
If there are 20 or 30 barrels then it's easier to sell them individually or in small lots.
But if there are 40, 50, 60 barrels then it could take 6 months to 1 year to sell that many barrels on eBay.
And by the time the seller pays 14% in fees to eBay and Paypal, and the cost for shipping materials and time spent managing photos and sales ads, then any additional money is going down the drain along with a lot of time and effort.
I can see selling them in small lots at a discount to entice people or small gunmakers to buy them.
But they must be almost 50 years old.
I don't want to guess what they're worth because I don't know enough details about them.
But I do know how much I wouldn't pay for one, unless it was something special.
That's mostly because I'm a realist, and I'm pretty much all set with BP guns.
Most folks are sending barrels to Bobby Hoyt to be re-rifled for about $140 or relined for about $175.
That includes breech plug, sights everything included to fit into a factory stock.
Buy an old TC barrel for $50 - $60, or buy a rust bucket and let Hoyt fix it up.
Turn it into a .54, .58 or .62, round bottom rifling, square bottom rifling, or whatever you want.
Even smoothbores.
People seem to love the quality of his work and his prices.