Stickii searching!

Hi stationary friends! I became a Stickii cute pack subscriber this past year and I love it so much! The advent calendars in December were my first and they were my dream gift! I’m on the look out for old Stickii cute packs that people are selling or old advent calendars and I can’t seem to find very many. Anyone know the best place to find them or are selling them themselves?! I check Mercari, eBay, Depop and have pretty spotty results. Thanks everyone 💕