I have a Dillon 650 with case feeder, a Lyman, Lee Classic, and an old Rock Chucker.
You can really crank out ammo with the 650, but they are pricey and do take some tinkering (I have overhauled mine twice in 20 years). It's a good machine and Dillon stands behind their product even if you are not the first owner.
The Classic I use just like bogon48 describes and it works just fine that way. Will it last as long as the Dillon.......probably not, but it's not going to break the bank either and like someone else mentioned you're going to need other stuff........lots of other stuff.
Buy a good scale, I prefer a beam scale and a good powder dispenser (I like the Lyman #55).
For the record .......I still use the machine I learned on the most (that old 70's vintage Rock Chucker). - gene