Started reloading in the early 80s with a couple of buddies, used their RCBS equipment, both kept urging me to get a Dillon press. Actually found an RCBS Rockchucker at the dump and took it home, never set it up, still went to my buddies, mostly for comraderie. Eventually got a Dillon 550 off EBay with extras for $200, kept what we could use and sold the rest for $100. Hauled that thing around for over 15 yrs until I moved to Montana before setting it up. Hit the jackpot at an estate sale, 3 big boxes of reloading stuff for $300. After sorting out what I wanted I sold the rest piecemeal for about $700 thanks to some extremely rare die sets.
Now for the OPs question, I don’t honestly know how much I save in $, but I can say it saves my sanity when PTSD starts getting to me and that’s priceless.