Rules of the offer:
1. You can buy any 3 products and get 1 of them for free (the cheapest one will be free);
2. No coupon needed. Discount will be applied automatically at Checkout;
3. You can't combine this offer with other discounts;
4. You need to have at least 3 items in your cart to get free item;
5. The more you buy, the more free items you get (i.e. buy 6 items, get 2 of them for free).