I don't remember exactly when it was, but a few years ago I got super lucky. 2x Vampire costume, 2x Rippers Dagger, Rippers Scythe, North Wolf, 2x Wedgehead Executioner, and some Bow/Xbow skins that I trashed because I'm a DK. Then again, I wasn't counting how many chests I opened and I bought/opened them at random times.