Walgreens offers a selection of vitamins for free after rebate. Walgreens also offers free shipping on orders of $25. Note that the rebate form is available right on the product page. Please print the form as you buy the product, just in case it is removed later for some reason.
Factor Nutrition Labs Ubiquinol CoQ10 Dietary Supplement Capsules $10
Sundown Naturals Vitamin D 1000 IU Softgels $4
Grab a couple of these offers and get your total to $25 to get free shipping. Then submit for the rebate on each vitamin product and get it all free. Well, except for the cost of the stamp. Woot! you can submit the rebate online!