Bid on Live Corals
Many of these are frags of corals. Frags are a great way to start an SPS coral population in your reef tank and are much cheaper than buying the complete coral. They should be glued in place on a live rock with plenty of light to assure growth. Most frags are 1/2 to 2 inches in size and in the proper lighting and water parameters will grow quickly. Be sure to allow plenty of space for growth. Acroporas will grow and spread until they crest the water. Montiporas will expand in a layered bowl manner as space will provide.
The benifits of buying corals online is the greater variety that cannot be found at your local pet store. Buying several items from the same seller can reduce shipping costs.