I wouldn't give him a second look. Period.
First off... His breed states he's Quarter Horse. But Quarter Horse's do not come in pinto color. If he has halter points, he's only registered in the PtHA which is just a color registry, not a breed registry. I don't buy horses from ignorant owners. But that's just a major pet peeve of mine.
Onto him. At 7 years old. He is wayyy downhill. Back is long. Neck is short. Croup is steep. I wont comment on his legs because I cannot see them with those photos they have posted.
As for his training. It's minimal. He's already gate sour, which means he's either in pain, or they rushed through their training. Don't fix someone else's problems. It's NOT fun and better to get a clean slate. He should have so many things down pat before even seeing the barrels. Otherwise you end up with problems and they are hard to break and no fun to fix.
Flashy color? Sure. But he's not what I would look for as a barrel horse. At all.