I got back into reloading a couple years ago. I already had an old Lyman press I bought brand new in about 1974 when I just reloaded rifle, a scale, a powder measure so not a lot of cash outlay. Feeding issues with some Winchester "Forged" and a bad experience with over-pressure Maxxtech ammo, that damaged one of my pistols sent me back the dealer where I bought bought it, with the 19 1/2 boxes remaining from the 20 I bought. They graciously gave me a store credit and I bought some bullets, some primers, and a set of dies (I had some 700X left from when I used to load for shotgun) and I have not looked back.
I watch sales and the EE, and either by components on sale, in larger quantities or discounted on the EE. Presently, 9mm are running between 9 and 13 cents a round. (most recently, I got a really good deal on an 8 lb box of HP38 with 7 lbs left in it; what a great powder!). I also reload .40 S&W, .45 ACP, .38 S&W (9mm dies), .223 (does not save money compared to bulk ammo, but shoots way more accurately), and 7 X 57, and if I can find the rifle I want 6.5 X 55.
BTW, Pistol ammo is easy to get started with; I find bigger caliber is easier yet; .223 is a pain with the small projectiles.
I'm reloading enough now, I am starting to consider a progressive machine; that would eat up most of the savings of reloading until it's paid for; but a complex machine will also require, more maintenance.
Have fun, it is a great extension to our sport, and can be very rewarding.