I wasn't sure where to put this...
tl;dr - I am the seller and I included allen keys (2, which is enough to disassemble the marker) with a package because I accidentally listed them in my sale thread. They were not originally included but it was my mistake and I'm owning up to it. I guess he thinks I am trying to scam him. I replied to his last response but have yet to hear back so I cannot post a shot of what I sent to him.
My sale thread is in my sig. I have not changed anything with the exception of the SOLD text.
If anything else is needed, please, let me know.
So, I did what I said. In your opinion, who's at fault?