It costs a lot of money to ship live animals. It would not pay if someone just ordered 10 snails, or a $1.99 yellow tang.
When I order from here, I usually try to get some snails, crabs, and things for my clean-up crew, in addition to the fish that I want. That way, it comes out to the $79 you need it to come to, and you are still only adding one fish to the bioload.
If you cannot do that, just find someone in the area and split an order with them. Go to your local reef club and organize a group purchase from here. Many people in my area do that with sites that have a huge minimum purchase.