Like others have said that would be tough to say. The market here is poor at best. It's definitely a buyers market right now.
He is super cute though! My daughter would be in love (we won't show her lol). I would say here he might fetch a decent price because we don't have the cob like native breeds here like in the UK and certainly not pony sized. I've seen a few over the years but that's it. Even in a bad market a good solidly trained pony will still sell. I saw a Fell listed the other day that was very, very green and asking was 8k likely because of the rarity here.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.