Sephora is my favorite place to shop for beauty essentials and, right now, they have some great stuff for under $10:

Stila 24kt gloss (made with genuine 24kt gold for a glistening pout) - $8

Laura Geller baked pearl eyeshadow - $5.80

Sephora Tricks of the Trade lip peel (exfoliates and conditions lips) - $7

Sephora face refreshing toner - $5

Korres Body Butter to Go - $6