I was actually trying to buy totally normal things like Christmas ribbon, and wrapping paper, and not be maimed by hoards of shoppers toting baskets and carts full of dangerously pointy objects (have you ever noticed how pointy Christmas decorations are? Stars. Fake poinsettia petals. Glitter branches. Elf hats).
Anyway, if you feel like buying some Christmas shells, Michael's has great stock for under $10 (a bag of varied shells and the large abalone pictured above).
Also, I saw these for sale. But I'm still a little too traumatized to talk about it.