I find the best deals are where shipping is separate. With free shipping I have to pay for the rare person in remote areas (Alaska...) who costs a lot more to ship to. By separating shipping my costs are much less.

The above applies ONLY when the shipping charge is the actual shipping charge. All the big shippers make it easy to figure out what shipping a package will cost so you should know when I click add to cart what the costs are. (As a bonus it would be nice if you would tell me which item in my cart costs so much to ship - some things are worth buying locally because retail can use cheaper shipping to the store)