Check out this deal on Amazon for Band-Aid Acne Patches. They have a 7-count pack on sale for $3.79 (usually $7.12), but when you buy one, you'll get a second one for 50% off; you'll pay just $5.68 for two packs, which works out to just $2.84 each.
Prime members will get free shipping, as well as these other Amazon Prime benefits. Here's how to sign up.