I only have one but he's not really aggressive. They will stare you down and are quick to move toward you most of the time. Just because they move toward you does not mean they are out to bite though. I can see how it would freak some people out.
As for the price....you are probably paying more for color as said earlier. At that price I would make sure they are cb. They can be a gorgeous display snake for sure as I never get tired of looking at mine.