I would take the time to see this horse in person and ride this horse.
If you like her I would take the money for a PPE that includes x rays, rectal for any abnormalities associated with ovaries/uterus and blood work. If she is sound for those, you just bought yourself a fine horse that will probably cost you $1500 (with PPE to that extent) plus shipping.... .
There is something about the outside of a horse that is good for the inside of a man. ~Winston Churchill
) Dinosaur Horse Trainer