Amazon takes $1.50 off select CoverGirl makeup products via this clippable coupon. Plus, get an extra 5% off and bag free shipping when you order via Subscribe & Save, which yields prices starting from 77 cents. (Eligible items are marked.) That leaves many of these items around $3 under the price you'd find at local retail stores.
Be sure to cancel Subscribe & Save after your order ships to avoid being billed for subsequent shipments.