As noted, you can find take off barrels with the correct markings if you do a little searching. Once you chop it, or whatever, you are customizing it, and that takes another one out of the numbers of the "as factory" ones. They are already desirable & valuable. I looked in my notes, (as I have 14 OM 45's) and looked at what I paid for them. While I was able to snag a few from folks who didn't have a clue as to their true value, many of mine cost me over $600. The OM 45 Colt Blackhawk was only built for 3 years before the NM's came out. Total production was about 23,000 approximately. Since 1973 a fair number have been "lost" due to different things. From crimes to where a judge ordered them destroyed, to customizers who wanted something different, to exports that are now hard to re-import. Next, add in the variations such as the two different barrel lengths, the different models that were shipped as convertibles, the actual numbers of good ones in factory condition cause availability to be limited. Next, they are a desirable caliber so many folks want them.
Convertibles are scarce & pricy. As are the brass grip framed ones.
A $10 letter from Ruger will give you the basic model information to let you know how it was shipped. (BKH-44, BKH-44X if it was shipped with the shorter barrel. BKH-44B if it was a short barrel shipped with a brass grip frame.) A brass grip framed gun from the factory is worth over $1000 easily if in good condition. I own two of those & felt lucky to get them for $1000 each.
Boxes & papers for one are a bit pricy as well. A good condition box for a short barrel can fetch $150 or more.
I fully agree that the term "Dillon barrel" is insulting. Dillon does nothing wrong & makes a fine product. It's the monkeys operating such a machine without paying attention to their reloading, or the true knowledge of how to reload. Blame the operator, not the object. (Just like we need to blame the criminal not the gun for crimes.) But this post is more about what to do with a gun that has damage. NOTHING in the OP said a thing about Dillon & reloading. I personally know a guy who has a couple of Dillon presses, and shoots a LOT. He blew up a Glock. He immediately blamed himself for his reloading practices as he knew he didn't follow all the proper steps during a reloading session. NOT Dillon. And k22fan didn't read the post clearly. The OP went to the local store to buy it, even though it was listed on GB & purchased through it. At least that's the way I understood the post.