I just read the entry and no comments. My experience with Fast Flipper on IG.
He made an offer of a ZT 0777 for 5 of my disco Spyderco. He wanted me to ship a week earlier than he could, because of "work". He sent me a photo of a tool box full of knives as some type of proof he was legit. My inquiry of the facet he obtained such a collection went unanswered multiple times. Not a Forum member, did no BST on FB, nothing. He did provide me with an address, an address to nowhere,Tennessee.
The interaction went on for about two days, I felt early he was a scam based on the things you mentioned.. No posts, no followers, and so forth. I consciously started switching knives from our original asgreement, not once did it bother him.
Icing on the cake was he was generously sending me a ZT 0770 for free.
IG sucks for knives. No accountability, no protection, and certainly operates in a dark anonymity.