Guys, guys... Chill out! Purple is just the expression of a gene that makes anthocyanin-- it is often triggered by lower temperatures or may, in some strains, pop up no matter what the temperature may be. THC production genes are NOT tied to the anthocyanin genes. Purple pot can be good, bad, indifferent or kick-ass. A wise person judges the THC levels, not the color. It is pretty, though. Sometimes eye appeal is enough to make the sale--at least to an inexperienced buyer. No matter what the color of the plant, it's the THC that counts. End of story!