Not my exact area of expertise but we went through something similar here in Asia where sellers rushed to clear stock before the government stepped in with price and export controls.

If you have the logistics set up already then you could quickly sell them on:
* Facebook marketplace.
* eBay.
* Amazon yes, but run the risk of them closing down your account.
* Local classifieds and Craigslist.
* Reddit though just be wary of each subreddit's advertising policies.

As for how to package them, the most popular configurations I have seen here are 5-packs or 10-packs as they need to be changed on a regular basis.