I had a couple knives made by Mark as well and your right it was a battle to get him to ship. The last knife I got from him pissed me off so much I sold it. Then he kind of went away and then reapeared and started taking deposits and boom, I'm closing down the shop for the summer. I felt bad for all the people that gave him money because I knew he was going to screw everyone over.
I wonder if he is teaching the inmates how to make knives ?