Are you in need of air filtering for ants? (or just a 3d printer). Cant stretch to the Xiaomi (or fit it into your 3d printer enclosure). Need an air purifier in the right scale for your Funko Pop purchases? Then the Elegoo activated carbon filters are for you.
Not quite the cheapest, but within a dollar according to the Camels, and still cheaper than eBay coupons with Jack on board.
"Limited Time" deal according to Amazon, no idea for how long.
I see what you did there pre-making the ZooLander joke