it's pretty clear that you sent out a confusing best offer in violation of ebay policy, and arguably in the form of a contract with contradictory terms.
Thank you for writing eBay in regard to your concern about the seller refusing to honor your agreement.Thanks for bringing this issue to our attention. Your report will help make the eBay Community safer for everyone.
Is there something in that response that indicates that I was in violation of an eBay policy?
It's pretty clear you jumped the gun, got nasty despite of your contribution to the mistake, went on a neg-feedback rampage rather than settling this thing in a responsible manner (I noticed that Tarmac waited over a week before retaliating - a sign of a cool head compared to you) and generally act like you're in the right despite of a fairly substantial majority opinion that you are in the wrong.
I don't want anything. The purpose of the thread is to give notice to others about various practices that eBay sellers sometimes use. The purpose of the original post was simply to inform.