At Amazon, buy one Aquaphor, Eucerin, or Basis skin care product and get a second item 50% off. Even better, you can order most items via Subscribe and Save to get an extra 5% off and bag free shipping. (You'll have to go to the product page and add two of the same item to get the Subscribe & Save discount.) Combined, that puts several combos at the lowest total price we could find, especially compared to retail store prices.
Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.