Heroin seems to go in and out of fashion, like skinny ties and wide lapels. I guess this is true of a lot of illegal drugs, but here's some scary news: A bag of heroin, the same kind that 20 or 30 years ago went for thirty dollars, now goes for four dollars. Not forty, that's FOUR dollars!!! So a kid can get hooked for less than the price of a movie or a paperback.