for that small of an amount, why not buy at the LFS...you can pick it out yourself, check for size, shape, life on rocks, and best of all a lot of LFS precure the rock, so if you keep it is saltwater when you move it back to your house it will reduce curing time for the rock
more life on stuff online? 1) pics of random rock that you probably won't be getting can be decieving..2) a lot of that will die off in curing...because for any rock that will be shipped, you WILL HAVE to cure or more aptly, recure it
I agree with checking out Ebay for Life Oceanic they sell it for $2.24 plus shipping. The cheapest I found it and had no pest or problems with it. They were really nice to deal with and you can actually call and talk with them for specific request.