Classifieds

Astronomy Mall
The sale of hobby related equipment and accessories listed for free.
http://astronomy-mall.com/

Astronomy Pinboard
Accessories, software, observatories, binoculars, telescopes, components, photo equipment, and miscellaneous items.
http://pinboard.astroinfo.org/

Canada-wide Astronomy Buy and Sell
Contains new and used telescopes and accessories.
http://www.astrobuysell.com/

Cloudy Nights Classifieds
Classified listings of used telescopes, accessories and observatories for sale.
http://www.cloudynights.com/classifieds/

ScopeTrader
Reflectors, refractors, mounts, cameras, scope building, eyepieces, and observatories.
http://scopetrader.com/