I now have four, my old original uni-flow I bought a long time ago, Lee pro auto disc that came on my Pro1000 from 25 yrs ago, the hornady that came on my LNL-AP, and recently I bought a Hornady Auto Charge for hard to meter powders like stick and large flake.
I don't need that many, just accumulated them over the years, I could sell the uni-flow but why, I may need it for some dedicated use some time. Then I'd have to go buy another one at more than twice what I paid for this one and the stand it goes on.
My father started me reloading when I was 12 so I have inherited, accumulated a lot over the last 42yrs. More than I really need. I junked two presses from being worn out, made in the 50-60s, after I kicked one laying on the floor in my bare feet one day when the lights were out.
I've hung onto everything else because it reminds me of when my father was still alive and we were reloading and hunting together. Good times.