Should I sell origami?

Making things out of origami has recently become a hobby of mine and I've made a lot of swans and cranes with the origami paper I bought. I was hoping to make a little extra cash and thought it would be a good idea to sell cranes or swans. However, I do have a lot of questions about it. First and foremost, is it legal? I was just reading about a copyright but "traditional" designs are okay to sell? Second, how much money should I charge for X number of cranes or swans? Third, where should I sell these? Thank you all for your answers.