1. That comes with experience, my friend. Buy from somebody you can trust at first, and get a scale.
2. Only one way to tell if a bong is good or not, and that's by smoking from it. Generally decent bongs will range from your $50's to $300's. (Glass, of course). Most people dislike carb bongs, and prefer slide ones.
3. Get a small fan and aim it at your window, and blow into it. Also, those glade plugs or whatever work wonders :thumbsup:


Welcome to CannCom :hippy: