I got a 14ft Jon Boat this past summer off craig's list. It's an old beater, we camo'd it up and have a trolling motor. It serves the purpose, was cheap, and if it gets dinged up here or there its ok. Still looking for a decent deal on a small 5 to 9 hp to go on it, but for now its perfect. Until I do I'm limited to smaller lakes or slow moving creeks, but I use it to go fishing and we used it for a couple hunts this year. Built a blind for it, but most of the areas we hunted this year we ended up wading into for some passing shots at woodies, so the blind wasn't really necessary as we weren't in the boat. Maybe after I get motor on it that will change.
The one thing I would say if you do go the craigslist route is try and find a seller with a title. It just makes your life easier if they have one.
Best of luck and enjoy it!