Soooo. I'd first like to say I love this guy.
I honestly think he'd be a wonderful match for you and your experience. If I was a smaller rider (like yourself) I would be all over him. Wonderful prospect and in my opinion, completely worth the 3k they're asking. In my area, horses like him go for 15k+.
He is wayyyy cute. Even though he is a smaller mount, his canter looks so smooth and it seems to cover the ground quite nicely. He has that paced "rocking horse" canter, making his round seem so effortless and well put together. I can see his flying changes aren't there quite yet but that's not really a big deal since he's only been in professional training for 5 months. If he can get that far in 5 months, I'm sure his leads will come in a matter of weeks. :) His flatwork looks like it needs to be fine tuned but all of the basic building blocks are there, he's got wonderful potential.
Now his jump is adorable. He snaps up those knees evenly and so square, I'm definitely in love haha. I can tell he's the type of horse that wouldn't get frazzled or out of control if he (or you) found a weird distance, he just seems so la-de-da about the whole thing. Ahhhh I love him. :) The guy riding him also does wonders for how he looks. His eye for the jumps allows the horse to have the best jump possible. I'm pretty sure you can be confident you would be getting a quality trained animal from this guy. :)
I can see him doing super well in the hunters. He just has the "hunter look": amazing jump, easy going pace, wonderful disposition, everything a judge would be looking for. He makes the 2'6 jumps looks easy, I'm sure you could bump him up to 3'3 and he'd be just as lovely and sane as in the video. As for jumpers, I'm sure he would do very well in that area too. However, he screams hunter to me more so than jumper. :)
Now his build is pretty solid, I'd like his neck to fill out a bit more and become more muscled, but overall very nice guy. Plus, he has more filling out to do since he's only 5! Robbie didn't become a "horse" under he was 5 and a half. ;) And even though he is smaller, I'm sure he'll look so much more proportionate to his rider once 5'2 you gets on. :)
So I basically have nothing bad to say about this guy. I absolutely adore him, his jump, his disposition and his potential. I really think you two would be an awesome match and you can really bring out his full potential. He's a steal at 3k and if he was 16.3 I'd be after him in a heartbeat.
I really hope things go well tuesday when you see him, I really need to see more of this gorgeous guy!