Those looking to purchase a miniature horse can turn to rescues, breeders, private owners or other types of sellers. Typically animal rescues charge significantly less than breeders, but their availability depends heavily on location; rural areas typically have more barnyard animals for adoption than urban or suburban areas.
Sites that advertise horses from breeders often have rescue sections. Additionally, a traditional pet adoption site often has an option to search for horses. When searching for horses, be sure to check "miniature" for the breed. A trainer or breeder of mini horses may be able to point you to a reliable or trustworthy rescue that you weren't able to find on your own.