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Collecting

Listings
Maps, globes, atlases, guide books, and zip code maps; also custom mapping and satellite images.
http://www.aworldofmaps.com/
Over 6,000 high-resolution digital images of maps from the David Rumsey Collection, one of the largest private collections of historic maps in the US.
http://www.davidrumsey.com/
The IAMA's main purpose is to promote the professional trade of antiquarian, collectible maps and related books combined with promoting public interest.
http://www.antiquemapdealers.com/
RMCA is a group of road map collectors throughout North America and Great Britain.
http://www.roadmaps.org/
Creates unique, custom, hand-painted maps based on a client's trip or historical area of interest.
http://www.walkermapstudio.com/
Solid oak United States quarter maps with press-in pockets to hold the coins. Photos and company background.
http://www.wenswood.com/