At his age, it's certainly a good time to set him up with a good trim regime and correct the toeing out. Could possibly be fixed with a single trim, as I agree, that I doubt he's had much if any attention yet. This is a good example why you should NEVER wait until they are a year old or more to trim them, if he'd been trimmed all along, he could have perfectly straight legs. That being said, his bones aren't done growing, so there's time to correct it. And, as was mentioned, he could also be standing funny for the picture, and the comment about youngsters toeing out with the funny grazing stance, points to keeping up regular trims when they are by momma's side, since ignoring them also can create a sort of club foot for some horses. Sorry to get on my soapbox and hyjack your thread!
Cute little colt, but if you're doubting it in your gut, then pass. There are plenty of horses out there, it's a buyers market and you can take your time to find the perfect match, without hurrying. If you saw him and liked him, and he's gone before you return, then he wasn't the right horse.