Classifieds « Amateur « Astronomy

Astronomy Mall - The sale of hobby related equipment and accessories listed for free.
Astronomy Pinboard - Accessories, software, observatories, binoculars, telescopes, components, photo equipment, and miscellaneous items.
Canada-wide Astronomy Buy and Sell - Contains new and used telescopes and accessories.
Cloudy Nights Classifieds - Classified listings of used telescopes, accessories and observatories for sale.
ScopeTrader - Reflectors, refractors, mounts, cameras, scope building, eyepieces, and observatories.