If you're buying more than one bar, Build Your Roster is the cheapest way to do it.
We tried pre-made bundles for a while and they didn't take. Everybody wanted to pick their own lineup, which is fair — a bundle somebody else assembled always has at least one bar you didn't want. So the pre-made sets are gone and Build Your Roster is the one that stuck.
You choose the bars, the per-bar price drops as the bundle grows, and a bigger cart is also the easiest way to clear the free shipping threshold. Two things working in the same direction.