We bought it. Most cats react to it kind of like marijuana, playful, mellow, munchies. They are funny to watch.
Our Merlot has very little reaction to catnip. Her predecessor Ramases went nuts for it, drooling and speeding before finally mellowing out and going on a silent, spacy trip. We stopped giving it to him because he was getting so stoned.
That is interesting! Why would the sellers want the cats high?