In 5 years of dealing with people I have only left negative feedback once. People like this are what give new people with no feedback a bad name. After multiple confirmations he used the ol' standby of having to work. Then removed himself from the message. I found out that if you delete a message it will also tell the other person you removed yourself. I get a lot of message a so I delete anything a few days old and found this out when I was asked multiple times why I was removing myself. I thought that may have been the case but texted since we had multiple forms of communication. After over 24 hours of no response I know that's not the case.
Seller beware, luckily a $420 sells quick.
I don't expect him to respond, and could care less if he does.