So this is mostly due to my own idiocy, but I think it's worth sharing:
I used my free novelty on the BL shop to buy the riding broom, then shortly after realized I had purchased it before when I switched to an old character I hadn't played in a while.
I suppose I just wonder why there can't be a message on BL items to tell you if it's a purchase you've already made. Similarly to how weapons will have in red text that you can/cannot use it based on your profession/spec.
Just a bit sad I missed out on expanding my novelties wardrobe because of a mistake. I get it's my problem, but I think it'd help a lot of ANet could add a warning on novelty and appearance based items that you have purchased before.