Orion has it listed in their bluebook. and it has a retail value of $500.00. I don't know if that is a good market valuation as I have known Orion to be off.
The MCC301M is $1500 retail and is 300 watts into 4 ohms and 600 watts into 2 ohms, all at .005% THD of course on 12.8 Volt DC.
You will need a Big battery though!