IMO, that is the least preferable method.
IMO:
Many claims [and ID's] on the corals are questionable, especially claims of rarity.
Photos tend to be doctored more than online vendors [certainly more than the LFS]
There's less recourse if there's a problem.
Personally, I don't like the idea of these precious reef creatures being auctioned off for dollar ... with little care of it's life past getting the highest price.
IMO, I'd either go with a online mailorder, a LFS, or for coral check a reef club. I prefer to see my new creatures in person first, to see their color, health, and see how they're doing.
Better deals, all IMO are a little more vested in having their storefront/reputation being thought of well.
Given on Ebay sellers can threaten to leave bad feedback for you, among other `games' ... I just don't trust it the way I do a store I can search online about, or ask locals about.
Just my take.
