They are very cool snakes indeed, I used to have one and it's probably the easiest thing I ever cared for. They make excellent first snakes, and are an all around good snake to have around. They are so cute during feeding time, no constricting or anything, they bite it and just start to swallow it LOL.
They have very cool personalities, and are big bluffers. Meaning, they'll fake strike, no open mouth just hitting you with the tip of their snout. Just a big bluff, so getting bitten from one of these guys isn't likely. They also hood out like little cobras when they feel threatened, it's quite cute actually.
Very inexpensive, you can probably get a hatchling for $30 as a normal. Morphs I'm not too familiar with prices but try checking out some breeder websites and try checking out Kingsnake.com to see the lists of morphs for sale.