It's definitely a Calico - the pattern itself is pretty unmistakable (especially towards the tail) and you can see the flecks coming up the sides. How old is it? My guess is pretty young since there are still pink flecks which will turn white as he matures. If it is younger, it may not end up to be as low white as it appears right now.
Either way, I'd pass. More so because of the pattern rather than the amount of white. A good Calico/Sugar, in my opinion, has a nice and clean back stripe, with a good amount of blushing, that almost looks like it's been poured down from the top and is melting down the sides. Even though low white Calicos/Sugars can produce high whites and vice versa, the rest of the pattern tends to hold true.
Ultimately, for this snake and others going forward, if you're on the fence and need to ask others what they think, you probably already have your answer.![]()