Are you selling one or thinking of picking one up? They are the Power Class versions of the Art Series AX606. Very good amps in my opinion. I am planning to use one in my truck when I get the time to do my install. The Value will depend on the condition. What shape is the amp in? Here is a link to a manual for it if you want to look it over. It is listed a PCPRO6800 Which was the next years modle number.