how much is it worth?
 

first time on this forum so thanks in advance to anyone who answers my question. So I have a new in box rockford fosgate power t15004 amplifier. I got it in 2006 but never installed it. I was talking with a buddy about installing a system in his chevelle and this amplifier came into the conversation. I told him I might sell it but I have no idea what it might be worth. So that's the question, what is this amplifier worth? I can't find any comparable amps on ebay or even a Google search. any info is greatly appreciated.