He is a max white sabino, or possibly dominant white which is a fairly new genetic factor, as is his Dam, Silverella:
Silverella is a daughter of Ardrie Apachie thought to be the worlds foremost color producing thoroughbred stallion in the world who is also a Mr. Prospector son. She is also a Vandlandingham grandaughter, a very successful racehorse exported to Saudi Arabia in 1996.
Sabino is thought to be carried by horses with white spots on the chin, so the sire is a minimal sabino.
Raise A Native is a Native Dancer son. I used to own Dancebel, a Native Dancer grandson and he was a sabino who threw LOTS of wild color in his foals. I suspect this foal is a maximally expressed Sabino and it's possible he carries the frame gene as well so might be LWO as well.
His ears look Biscuit's ears - a light palomino. Could be just the way the light is hitting them or not. Cute little fellow - but if he was all of that and a bag of chips rare they wouldn't be selling him for $25k.
I see the color on the ears in all but the last picture, and I know that he definitely isn't grey, because he's got pink skin, so I'd agree with maximally expressed sabino. He's cute, but it seems like they are basing the asking price off of the fact that he's "white", and I wouldn't pay that much for a horse based on color alone. He's going to be one hard horse to keep clean lol.