So I found a hell of a deal on an Alpine PDX-M6 at a local pawn shop. It was marked 'as is' and is missing the fuses and it looks like the connections for speaker outs. Is there a way I can test to see if the amp is blown if I brought my own fuses and maybe checked the resistivity? I know it may still have problems when I put power to it, I just want to see if there is a way to make sure it isn't completely fried. Also, who/where is a good place to get said amp repaired if it is needed? Any idea how much a typical amp repair bill is? Not sure it it's better just to pass on the deal (they want $20).