I've ordered plain leaf from salvia world and was surprised that it gave me effects (light headed buzz). I'm sure it helps that my tolerance has gone down. I ordered some 15x from them so I'm expecting it to work pretty good. They have the 2nd lowest prices I've seen so far.

I've also ordered from superpiece,they have flavored extracts. I got 10x from them and it worked pretty good.

I ordered 10x from salvia site because they were the cheapest and I can confirm that their stuff is crap. I don't get anything from their extract.