Many of the zoanthids you want will be available at the swap. When you buy them in the fish store, or online, desirable zoanthids can range anywhere from a dollar a polyp to $20.00 per polyp and more. When you get them at the swap meet, prices are frequently lowered and you can get a really nice coral for half or a third of what you would pay at the store. Here is a Tubb's Blue and King Midas zoanthid combo rock I am selling. Less than a buck a polyp and a great colony right off the bat!