First nobody gives anything away so when it says the 2nd one is free, realize the cost of the product and some profit must be made to pay for the commercials and shipping.
The reason you rarely see the shipping and handling charge posted is because everyone is so excited to get the product and the Free second item, they often overlook the charge as a necessary evil. I found one example, Free Perfect Slicer – 2 Pack less than 5 ozs of weight $15.99 P&H.
When the item has free shipping, you can bet it is included in the 3 easy payments.
Mike Magnant