I've bought some "hand held" avionics online lately - my state's sales tax is 7%, and I've saved a bit by avoiding retailers who collect it. If the shipping is free (or a wash) between retailers, the diffrence is, well, 7%. My imperfect understanding is the Amazons of the world were quick to begin collections when the courts backed it - as it put a new burden on small(er) competitors. I've seen manufacturers in other arenas who sell direct online are slow to adopt collecting the taxes. Brave new world. . .