I sell a few on IG. I'm not sure I ever put a price "for sale" on there. But people slip into the messages anyway and buy a few. It's an ok platform, but there is a yuuuuuge amount of makers on there. I sell a lot local, which may or may not be enhanced by FB. A lot of locals like/comment.
What thing I can say for sure...they are buying YOU, the maker. There are lots of totally serviceable knives out there, cheaper, fancier, stylistically appealing...whatever. Put yourself out there, do your work with a happy heart, and treat a customer like you And, for crying out loud, don't ever take money up front unless you have a government contract or have to pay a smuggler to get you the materials to make the knife. Languishing commitments to supply already paid for knives has undone as many good makers I'd bet as much as anything else.