You need the unit itself, all the dies, the lube, sometimes a lube heater. Granted once set up it a one and done deal to lube and size, but the juice ain’t worth the squeeze.
Tumble lubing is the most easy and takes little equipment. add a squirt to the bowl of bullets, swirl around dump out and let dry.
PC is the same as tumble, with the added step of the easy bake oven. But, it also seems to always work. Not sensitive to alloys.
And you can get powder from Prismatic Powders, same company that owns Cerakote. So, you can color coordinate your guns and projectiles.