Bass Pro will let you complete an online order for in-stock items with a free-shipping total cart price, then email you the next day and tell you what they are actually sending you. They'll cancel your items that they don't have, but if they happen to come back in stock within a few months of your order, they'll reactivate that part of your order and charge you shipping as they send things out. I had a box of ammo show up at my old address about 2 months after I moved to another town. I told them I'm done with their online orders.
