I will let you know from my experience, I just had my boiler replaced and had to move it this summer (2022). I redid the pipe myself. I had to thread from 1/2" to 2" pipes. I already had a Harbor Freight set with 1/2" 3/4" and 1" dies from making some black pipe shelves for my wife in 2018. I needed a 1-1/4", 1-1/2" and 2" threader. I found a cheap off brand set for $99.70 shipped with 3/8" to 2" dies. In 2018, the Harbor Freight die failed almost immediately on 3/4" pipe, but I took it back and exchanged it and the replacement still works fine. The off brand one, the ratchet skips some teeth in one direction. I took the head apart and looked at it and it is rough, I could grind it out and it would work fine. Then the handle broke. I used a piece of 3/4" pipe as a handle for a bit, but I ended up just using a 36" pipe wrench to turn it.
Even with the issues, I think the price I paid was worth it. The harbor frieght set, I think I could get out any time and do the job. The off brand I think I could make it work well with an hour of work, but as little as I would use it (if ever again), I probably will just use it as is. A $400 set would be much nicer, but for one time use, or little use and even used good sets are nearly twice as much, I think these cheap junk sets are all I would need.
One more thing I will say, Lowe's black pipe has a thicker outside wall than Home depots, and it is not as easy to start with a hand threader.