As part of a fundraising initiative for the family of CCP Mankiller (who passed away in July from Cancer), CCP have released 8 skins. Once $20K USD of these have been sold (all to be donated), they will be forever removed from sale. I expect that means they won’t be around for long at all.
They are at a nicely priced 60 PLEX each. I grabbed a couple for my own use.