Is this all you have to judge her on? Or have you seen her in person, seen her move, etc?
I have show dogs and if this was a show dog, I would think these must be the best photos (e.g. that rear shot), because who would provide them if they weren’t better than in real life? But, an average seller/photographer might not realize that they have caught the dog/horse in a bad position and send them on anyway. I would want better photos if I could only decide based on photos.
In general, though, I would never really want to make a decision about a horse on photos alone. I would definitely want at least video from each side, and if possible coming and going straight toward/away from the camera.
Also - it’s conFORmation. Picky spelling error but it’s a big difference.