I'm going to take a different tack and empathize with the OP, and support the value of his post. While I don't think eHam has any real role to play in this, it's useful to advise future buyers of a seller's track record of enabling gazumping. We've all had our ethics tested in financial transactions large and small and, if you choose to behave poorly, expect to be called out. My observation is that, sadly, the stakes often don't have to be high to yield a valid test of character.
73, Peter.