Skullies are the rarest item in Animal Jam because now, no one has them. Skullies were sold in the BETA days, and only costs 10 gems! (Of course, items in the BETA days were very cheap). It was sold in Jam Mart on the first page. Skullies are an item that go on your animal's tail. There are many other extinct items, but the Skully is probably the most famous of them all. Many people haven't seen them in the game. Well, to tell by the name: extinct items, they are gone! Every single one of them was removed from the game. No one really knows why, but many people do think it was because the Skully caused many glitch. (I don't know what kind of glitches). These Skullies aren't worth anything now, but that depends on your opinion. Skullies could be priceless, or they could be worth nothing, since nobody has them anymore. Many Jammers hope the will come back in stores, but that's probably not happening. AJHQ took every single one of them out, and it was for a pretty big reason. If these come back in stores, they wouldn't be worth anything. These Skullies were gone after the BETA days.