Probably extremely weak if it's on EBAY. I would not bother seems like it's the cactus which is legal but not grown how you want it. You can find "peyote" species of cactus in the garden section of tool shop but they barley have any Peyoyte.
I cant figure out what the use is. But Im going to guess, sunburns, rashes and stuff like that. I dont think its a pain reliever or muscle relaxer..