Okay, he is not worth the money they are asking by a long shot. They bother making a video to show he can do what? He literaly does nothing in the video that is at all impressive...nothing that the average 3 yo wouldn't be expected to do. He is not that athletic, he can't disengage his hindquarters well, he isn't that "smooth" or responsive, can't get "under himself", and he is far from collected. If you want a cow horse, you can easily get one w proven blood lines that has either been started or is well along at this price.
Now, if I just wanted a dependable go along horse, and this guy had the asking price he should have at this stage of his training (no more than 1000, if that), he looks like a nice guy.