Are there a lot of astronomy media for sale here at the North East Astronomy Forum? I'm thinking about things like books, star charts, planispheres, almanacs and such.
willman bell has always had all their books out on tables to buy.
There are a number of vendors selling books and sky maps, with a large selection. One had all the old issues of Amateur Astronomy Magazine, and other older books.
Sky & Tel had all of their publications, books, sky maps, etc. - plus a free copy of the latest issue.
Free magazines from Astronomy, Astronomy Tech Today (discount subscriptions available) and Astronomy Now (Brit magazine).
Cambridge University Press was there, with all of their astro books - selling at a discount. I got an additional half off on a book that they had slightly cut opening up their shipping box.
As mentioned above, Willman-Bell was there with all of their books for sale. A few years ago I purchased a copy of the 2nd edition of Uranometria 2000 and the Uranometria Deep Sky Field Guide. One of the authors, Wil Tirion was in their booth and signed all 3 volumes for me, and inscribed a personal note for me!
While Bisque was there, for the past 2 (or so) years they have not been selling boxed copies of their software - just demo'ing it.
Knightware was selling deeply discounted copies of Deep Sky Planner 6 (which I purchased last year).
A number of the major vendors (like OPT) had boxed software for sale.
Of course you will have to check with the NEAF website to see the list of vendors for 2015 - unfortunately, last year, they never provided the list until something like a week before the event. However, just about everyone from the prior year was there.
If you want a specific item from any vendor, give them a call at least a week in advance, and they will probably bring what you want, and set it aside with your name on it. I've done this for a few items in the past and it worked out just fine.