A note about Astromart
Astromart is the biggest classified ad web site for amateur astronomers in the United States. It is sponsored by a major telescope dealer near Seattle.
I have found Astromart reliable and useful. Bargains are abundant and most of the sellers are very reliable. I do not hesitate to recommend it.
Anyone with a business connection to amateur astronomy is likely to be classified as a dealer and will be expected to open a commercial account (there are several types; you can ask Astromart management for the appropriate one).
That applies even to me, although I do not sell my books directly and have never wanted to advertise them on Astromart.
For several years I did not use Astromart. In 2010 a compromise was worked out; I am allowed to subscribe as a private individual but am not allowed to identify myself as a book author in any Astromart forum.
Michael A. Covington
Author, Astrophotography for the Amateur
2010