I've used Craigslist for a long time. Everything from finding deals on snakes that people just don't want anymore to finding jobs, apartments and placing ads for my consulting business. Its a pretty good site but as a seller (or adopter in this case), you will want to be vigilant and get a feel for whoever you are adopting the snake to. Charge a reasonable fee to weed out the nutballs and you'll be fine. Good luck!