Choosing a New Horse - Untrained, Partly Trained, or Fully Trained?
For most people (e.g. excluding large breeders, horse dealers and such), it is usually best that you purchase a horse which is already trained to the level you will be using the horse at. If you will be using the horse for basic riding it should be trained to this level pre-purchase; if you are using it for advanced riding then you should buy a horse that is trained to the advanced level. If you are using it for show jumping, it should already be trained for show jumping.
Of course, one can purchase an untrained horse or a partly trained horse. Such a horse will be less expensive to buy. Also, you can instruct a trainer on exactly how you want the horse trained, and you can have the experience and pleasure of participating in this. However, against these advantages, there are a number of disadvantages:
Because of these factors, buying an already trained horse is often less expensive, less risky and less stressful than buying an untrained or partly trained horse and then having it trained up.
You should not try to train a horse yourself, unless you are a professional horse trainer or working under the complete supervision of a professional horse trainer. When non-professionals train horses, the horse will almost certainly pick up bad habits and behaviors (which are very time consuming and expensive to correct), as well as the risk of accidental injury to the novice trainer.
You should also be wary of buying a partly trained horse based on the seller's commitment to fully train it. Having made the sale, many sellers will rush the training and cut corners, in order to minimize their costs and receive payment as soon as possible. One should only make a purchase commitment when the horse is fully trained and you have ridden it to ensure that you are completely satisfied with the result.