11 Deals Worth Shopping This Week, From Beauty Tools to Free People's Sale

Obagi Professional-C Serum 20% ($114, originally $142)

With 20 percent pure vitamin C, the Obagi Professional-C Serum is a powerful option, ideal for diminishing dark spots and uneven skin tone. Although it's potent, it's also hydrating and great for those with dry skin. If you rely on a vitamin C serum in your skin-care routine, you can save on this effective one right now during Obagi's End of Summer Sale.