Join Date: Apr 2008
Location: Orange County, NC
A lot depends on what you are going to use the horse for and how old the horse is.
Certainly you want to ask about the medical and training history, current/previous use of the horse, and any diet concerns.
If it's registered, make sure you actually see the certificate.
If you don't know the owner well, ask for references, too.
You may want a pre-purchase vet check if you have any medical doubts. Having an experienced instructor/trainer look also can help insure you get a good match to your skill and planned use.
On the sixth day, God created the Quarter Horse.
On the seventh day, he Painted the good ones.