I hope he doesnt bid on the phone again...but yes i would never lower my price after the auction end. Not even a dollar!!!! I really hate ebay now.
Yeah you can block him. To be honest if I see a seller with a good rating like yours and I flip thru the feedback and see that you have a neg for him not paying, then us normal people wouldnt give it a 2nd thought. I have bought plenty from people with a few neg's and I know that they probably got them from the many flakes on ebay.
This guy was wrong and if you can I would report him Non Payment, and also for trying to cheat you.
Ebay has been real slow lately prob cause of the economy, so I have stopped listing stuff. I wish someone would create a competitor to ebay so we have a better place to auction our stuff off.