If he's gone through his first shed, then there shouldn't be a scar on his belly. Usually a responsible breeder will breed them after their second shed. Or at least I do. This gives enough time to establish them on rat pups, etc. If it's before all of that, it's a risk you're taking on because it might be that the baby has a failure to thrive plus you won't get to see it's true colors until after its first shed. Ethically, I wouldn't sell before they had at least 2-4 meals because to me, it's about the snakes being happy and healthy for the almost 40 years they'll be around, not how much money I can make and how much I can breed them. I also prefer to sell to others with the same values considering all the threads about neglected and abused snakes.

BTW, you post the pic by click on the second line, after all of the BIU (bold, etc), 4th column, third button in column. You have to upload to an outside picture site, such as imgbb. plug in the URL and it should post.

In general, though, if it's a burn or something, I put on neosporin and watch that snake like a hawk. I had a female, when I was a n00b burrow into her substrate and seriously burn herself. I spent a few months treating the burn with neosporin. Despite that she had a full recovery and went on to have little snakes of her own. She's still alive to this day and eats like a champ. She still has a scar on her belly where it happened and tends to avoid the heat spot, even though I cushioned it since.