The COPO catalogue that I have shows the same type of stuff. Nothing exciting. Perhaps the COPO cars that we like weren't exactly on the up and up COPOs. Perhaps a little hanky panky getting them through the system and someone just forgot to enter them in the book. Wouldn't want to ruffle any upper management feathers.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now.