Primer acts as a filler for pot marks to make the skin look more even, hiding flaws. Primers also provide more of a matte appearance. When purchasing a primer, you'll want to make sure you match your complexion. They often come in a variety of tints. Because primer keeps your makeup on longer, you'll have to reapply and therefore restock your makeup supply less often. Unfortunately, perfection doesn't come cheap. Primers range in price. Hit the local Sephora and you'll find Nars Makeup Primer for $33, while Smashbox Finish Foundation Primer will set you back $38. That doesn't mean you can't find brands for less. Both Loreal and Revlon make primers that retail between $10 and $11. So before you put on your face, make it primer time.