I'm just curious, now that the buyer exposed this private conversation to a public forum with the intent on receiving legal advise, does the seller have a case for defamation?
Truth is a defense to any defamation claim. If what was reprinted by brian1 are the messages actually exchanged, there has been no defamation.
It would not be too hard to identify the parties involved here, however. Whenever you publish information about an identified or identifiable person, you need to be careful about what you write. All that you post should be true or pure opinion (opinion that does not state or imply any false facts).
There can be copyright infringement issues when copying another's written words and there can be privacy issues with the unauthorized publication of private conversations. Although the potential is there, it seems highly unlikely that any legal action could be supported adequately enough to make these worth considering or pursuing.
I think both brian1 and the seller would be smart to sit down and settle the warranty matter - or they should start consulting with attorneys in their area - before they create additional legal problems for themselves, though.
