Amazon offers the Proactiv 3-Piece 30-Day Kit for $26.21 with free shipping, via the directions below. That's around $20 less than what most third-party sellers charge. It includes a 2-oz. bottle of cleanser, 2-oz. bottle of toner, and 1-oz. bottle of repairing treatment.
  1. View the Proactiv 3-Piece 30-Day Kit for $33.20
  2. clip the 20% off coupon
  3. checkout via Subscribe & Save to cut that to $26.21
Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.