One of my friends bought one last week from World of Disney at Disney Springs. We had seen a couple of smaller ones throughout the parks, but WoD had about five different ones, more than we had seen anywhere else. He purchased the biggest one they had, and it was slightly over $50. He took it on his carry-on and was stopped by security, but after a quick inspection, they let him through. He works for Southwest though, so I'm not sure that that's something they'll always let slide.
When he purchased it, the CM wrapped it in a weird cardboard "padding." You'd definitely need to ask for extra or take some (large) bubble wrap with you if you're going to put it in checked baggage.