I have bought off aquabid numerous times, from various different people. Every time, it has been good, I don't think anyone on aquabid will try to scam you or anything, it's too small a site IMO
. Also everyone who is selling stuff on there is usually a dedicated fish keeper, so they will make sure to ship you your stuff nice and safe. Also, most people on there are very genrous, I have had several people throw in extra plants or other surprises that I didn't even know would come with it.