Today I visited WHONA – Who North America – for the first time. They have open houses once a month, but you can visit on other days with an appointment.
For sale they have just about everything a Doctor Who fan could want to buy: all the episodes on DVD, audiobooks, other books, soundtracks, LEGOs, action figures, a Doctor Who Role Playing Game (how did I not know about that?!), T shirts, plush adiposes, fezes and bow ties, and more. They also have older memorabilia on display and a Doctor Who pinball game you can play.
Needless to say I did not leave empty handed, and my son and I will probably start to make a monthly pilgrimage.