You need to assess your current riding skill, and your goals in the near future. I would recommend having a trainer or coach go with you to assist in searching and trying horses. A coach or trainer will be able to be objective, and create appropriate guidelines for the type of horse you are looking for.
Something that I have seen happen before, is that people will buy a horse that is too difficult for their current riding ability. It seems almost intuitive that you might grow into the skill level of the horse, but it often doesn't work out that way. A horse is only as good as it's handler. You can always sell your horse or find a new job for them if you should outgrow them in the future, so the biggest thing I can recommend is to buy something that you can ride and enjoy *now*.
I just saw your sign "Dressage"))) l live in Ukraine. We have nice dressage and jump horses for reasonable prices. If you are interested, let me know what exactly you are searching. I can send you some info. Best wishes. Elena
Are you doing dressage or jumping?