I bought my Rockchucker Master Kit for about $200, around 2000 or 2001. It has everything you need except the dies and components. I don't know how much money I've really saved, but that's not really why I got into reloading. I just enjoy everything that goes into it, and you can tailor a load to your particular gun that will yield accuracy no factory load can touch.
But as wdlsguy said, cheap ammo is becoming an oxymoron these days. Your best bet for factory ammo is to try and find some surplus stuff, if your .223 will permit use of 5.56 military ammo.