First you have to get a membership. Then you get a fox. Then when your membership is about to expire you delete all of your animals except your fox. Then you'll be a non member fox when your membership expires.
A fox hat BY FAR. They are like the rarest of the rares and I know because I have been trying to collect one all my life and when someone has them, they are really picky about what they will get back for them if they put it on animal jam trade list.