There plenty of other vendors that are eligible for Prime for like $0.40 more, and tbh, I rather pay that little extra to get it faster and fulfilled by Amazon rather than a third party seller, especially now.
But as others have stated, this is a pretty bad deal considering how much it will be at Walmart.
You didn't find this in the Amazon Black Friday thread because, A, it's not offered directly by Amazon, and B, it's not a good deal.
Maybe next time.