I don’t, as a rule, ever buy raw toned coins. While I can generally differentiate between AT, and NT, coin doctors are getting better and better at their trade. As has oft times been said, even some sellers have managed to gas slabbed coins, as they are not air impervious. So, if someone has any AT coins, it taints their entire stature as a seller. Our Orlando buddy manages to sell toned slabbed coins under two separate seller names on eBay. He gets away with it consistently.