Try www.vanns.com or Ebay. I just bought one last week. Haven't installed it yet so I can't comment otherwise.
Where can I buy a Panasonic TU-HDS20?
I am already a DirectTV subscriber and want to upgrade to HDTV. All efforts to find a source for a HDTV receiver (e.g. Panasonic) have failed. They seem to have disappeared from the market (new and used). Some shops offer them over the net but only with a new subscription. What is going on?