China Security and Surveillance Technology Inc (CSR.N) said its chief executive was considering a proposal to take the company private, valuing it at up to $580.4 million. Chief Executive Guoshen Tu said in a letter to the company that the purchase price had not been determined, but did not expect it to exceed $6.50 per share, China Security and Surveillance said in a statement. An offer at that price would be at a 33 percent premium to the stock's Thursday's close on the New York Stock Exchange.
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