Well i would ask how old he is. That gives you an idea about how well he's fed and taken care for.

I'm one of those few people who really like low white pieds (and that comes from someone who owns a BEL). If i could take an extensive look at the snake, seeking for all the usual "Go" signs, i would definitely get him.

I would say meet the guy and see if you fall in love with the little one.