Wow, hard to believe it's been seven months since posting in this thread, time to dust this sucker off.
I unexpectedly came upon the long lost 5" Negan at Walgreens after work today. Looks really good too, thus was a welcome surprise. Was supposed to be out last Fall, have seen a few pop up on eBay but there's never been any definitive word from McFarlane one way or the other.
I ended up buying the MIA 3-pack with Rick, Daryl and Michonne off eBay because like Negan, this never showed up in any stores around here, even though it was supposed to be a Walmart exclusive. Then about a month later I actually saw one at a Walmart. Tough line to collect now.