IMO - you can just ask these Qs in the area for the relevant medium. To keep the mods from pulling out their hair, I wouldn't mention that the horse is for sale (that's a Sales forum question). Just ask what it's worth. E.g., you'll probably get more and better replies from putting such a Q for a china in the "Kiln" than in a general "Sales Quote" forum, where china collectors may not check at all.