Shelf space and cash are finite, so every brand you carry should earn its place. Stocking too many names spreads your inventory thin; too few and you lose customers who came in for something specific.

If you run a vape shop, smoke shop, or convenience store, your margins live and die by how you buy. The retailers who stay profitable aren’t necessarily the ones with the most foot traffic — they’re the ones who source authentic product at the right price, keep their best sellers in stock, and don’t tie…