I also have an experience that I never publicly shared.
I purchased his purple Mk6 for $900 several months ago... this one
A similar shipping experience to the ones posted throughout this thread. I purchased the knife and made full payment because it was a completed knife, ready to ship. He's quick to email me for the money and quick to email me to tell me that he'll ship it out the very next day. That's where the emails stopped. It took nearly a week to get any sort of confirmation that the knife was indeed shipping, and it came from an automated USPS email, not even from Will. Like others, the tracking sat there for roughly 3 more days before it updated. During this entire wait, I had been emailing Will a few times to get updates, with no response. He finally sent an email saying the same story he's told all of you others, that there was a delay and that he intended to ship it sooner blah blah.
Anyway, the knife does finally arrive, the quality is BAD. Multiple issues with the fit and finish. When I brought those issues to his attention in an email (including pics of the problems), after several silent days, he responded by saying that I'm being too picky. He said it's a handmade knife so it will have issues...lol. I told him to refund me immediately and that this knife was headed back to him. I didn't get a reply for another day or so, surprise surprise, so I filed a PayPal complaint. Refund in my account within an hour

haha
Immediately after the refund, I log in to instagram to just do other instagram stuff, and find that I've been banned from his IG page. Log in to facebook to find the same thing with his FB page. He silenced me before I could even call him out!