If yours is at all similar to mine (and mine is a cross, so a bit more “sporty” than a heavy type) he knows exactly what to do, with a rider that knows how to ask.
Mine could do some spectacular things with a better rider than me. As it is I could take him into most any situation and he would perform admirably.
But throw him in the 2A/2B classes at IHSA and he will bend to the outside, ignore the rider’s leg, and generally be a pig. I’ve had to tell the riders “tell him who is boss from the moment you put your feet in the stirrups. If he slugs behind, thump him with your legs good and hard.”
I personally don’t need to do that, but haflingers are SMART. Which is why they are also typically sneaky, comical, bratty little evaders.
Mine knows who is in the saddle.
So in short, I agree with what most people are saying. Basically, you really need to put someone on them that is the same type of rider that you want to market to.
I can school my horse all day long and get him going well, but put a kid on him and he’s not the same. I wish that I had a gutsy 12 year old to whip him into shape.
I would also take yours to some local dressage shows. I know when I take my guy to local shows the women love him and want something similar - small height, not as intimidating as a huge warmblood, good mover, lovely eye candy, friendly personality, etc.
I think your market at a higher price is a dressage home with a small adult, personally.