Craigslist isn't a good place to list - you will get FLAMED for posting live animals for sale, depending on the people in your area, and most craigslists don't allow you to sell living creatures - they will report you like crazy.
I tried selling my pure bred lab puppies (parents are fixed now, but both are pure bred, registered, and the puppies were raised at home, with us, and not by a puppy mill or anything like that) on craigslist and got so many flames for it... ridiculous! Most of it was just crap emails saying "you shouldn't own dogs!" and all kinds of mean things.
So crazy.... people on craigslist are crazy when it comes to listings of live animals, but there are plenty of other places, as well as local newspapers, or you can look for other retail companies that have vendor locations at shows (like if you go to reptile super show's website and look up vendors that set up stands there) - some will pick up snakes from breeders, or contact local pet and reptile stores to see if they are interested. Hope that helps!