Salvia, Kratom, and Fly Agaric are definitely legit legal psychoactives. I don't know about most of the rest of the stuff on that site. The legal ecstasy pills are iffy. I don't know all the technical names for the legal things that will produce ecstasy-esque effects, but even if those pills contain them, you don't know how much and no long term research has been done on them. Don't buy any of the herbal pills or any of the smoking blends. In fact, don't buy anything from there. http://salviazone.com/
has a good reputation for selling quality salvia and as for kratom, just google it and buy a small amount from a vendor that looks reputable. www.iamshaman.com
has some kratom products and generally have a good reputation. They also sell Hawaiian Baby Woodrose seeds, salvia, amantia muscaria, and kava.