EDIT: Thanks to @Bunsen for pointing out that there are new eBay codes that bring the price down even further and stack with the BASEUS20. They are PSAVES15 and PSAVE17 (for eBay Plus members). I might expire this post and start a new one with the new codes but I can't do that until tonight. So leaving this as a note for any prospective buyers.
Baseus are running a 20% off deal on their eBay store that happens to stack with the eBay PLUS12OFF or SAVER10OFF codes. These buds are at their equal lowest price of $16.99 and once the codes are stacked, price comes down to an all-time low of $11.96 for eBay Plus members.
This applies to all eligible products on this page but this one stuck out as being pretty damn sharp. I can't vouch for these as I don't own them but the eBay feedback seems positive out of 719 sales.
Another notable price is for the 5000pa vacuum here. I own this and use it almost daily around my coffee machine. It comes down to $27.87 with the stacked codes. Pretty sure that's the cheapest I've ever seen it.