The pictures leave much to be desired for critiquing a horse... All my comments are subject to better pictures being truly needed as so much is "off" and guesses with the horse being photographed on ground that is not flat, is full of manure and mud he stands in...
You need to ask the seller to remove the horse from the paddock and have the horse stand on level
hard ground of packed dirt, concrete or blacktop, and preferably with a solid background behind them.
Take pictures of the horse so the horse fills the viewing square evenly...
Front of the entire horse, back of the entire horse, from each side, then one closer of the head ears forward & alert, standing square of equal weight on each hoof.
With much question because of the footing, terrain and distance from the animal...
I question the hind end stance of the horse appearing very straight, post-leg.
I question the horse as in one picture hind legs look a decent straight, wide appearance of leg and hock but the other picture the horse appears sickle hocked and more than just a acceptable toe out that is normal for good movement.
I question the front legs below the ankle as there are "bumps", many of them, but not clear enough to see what it is.
Knees look large and flat, fairly straight but not positive there is not a slight twist happening.
The horses left front has some shadowing, but also possibly a high bow with thickening appearance...very unknown if actual or not.
I question the length and angle of all the feet hidden in a paddock surface.
I question how the SI joint is making the horse back appear to long, not to long, a light hind-end or adequate butt and then the tail-head and slope of the rump..the shadowing is terrible to guess on.
The pictures do not show clear enough a shoulder angle in relation to leg/hoof angle.
The throat-latch is unknown as is the tie-in appropriate or not of chest neck area to make the front end match in ability that of the hind.
The heartgirth looks more than adequate.
The face looks long with a nice shaped ear and eye, wide spacing between ears could be for a wide forehead...again though guesses not seen.
I will say again...
All my comments are subject to better pictures being truly needed as so much is "off" and guesses with the horse being photographed on ground that is not
flat, is full of manure and mud he stands in...
He could be a really great animal or one that has questionable flaws...but to be honest, fair and true to the animal the people selling the animal should of presented him in pictures or to you in much better surroundings.
I think he has much to offer you but to evaluate him as he is without being very guarded because I can see the uneven ground, the muddy cupped paddock area and it strewn with filth he stands in...the horse is not
shown to his best advantages...very sad for a sale prospect to be shown this way.
This horse has a great disservice done to him and his good attributes are hidden right now.
He has certainly faded greatly in those pictures from what I can see from a dark brown to a light brown/coppery shade is wow quite the spectrum of coloring.