We always get new ones. Have never purchased one. Living in Canada they don't get sent to us so we have to pick up at the resort at checkin, but I bring one with me to show the gate guard or get into the room if we are notified it's ready early and we haven't gone to the front yet.
We also always customize the back with a specific name. We typically pick Disney character names. The names are either all from a same movie, or we pick our names based on some other theme, like the color of the bracelet. I had a yellow one during one of our last trips and I had Lumiere on the back.