3 links
DressageWBclassified
groups.yahoo.com
A classified sales/wanted email list of only dressage trained warmblood horses of all levels. Information on how to join the list; archives for members only.
Holmberg & Wadeborn Dressage
hwdressage.com
Equine sales in Los Angeles specializing in dressage warmbloods.
Lynda Krogh Sporthorse Sales
members.aol.com
Listing of sport horses for sale in Santa Rosa, CA. Also provides classical dressage instruction for all levels.