Perhaps you think I won't go to too much trouble over a measly $60. Frankly, I don't give a [censored] about the money. I do care about the lack of respect you have shown me, and when you treat me that way you will find out that I can be one vindictive son of a bitch!

I would have left that out. It only shows your emotion and doesn't contribute much to your argument.
Very good though.
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-- Murray I What part of 'no' don't you understand? Is it the 'N', or the 'Zero'?