My homeboy is considering selling his system, well parts of it anyway.
He has an
Autotek MX-5000 amp and 3-Twelve inch
Kicker l7 Solo-Baric subwoofers in a custom box.
All specs for these can be found on the links, here are some pics of the set he has...

In the last pic, thats a piece of printer paper to give you an idea of the size of the amp. Approx dimensions are 8 & 1/2" wide + 22" long + 2 & 1/2" thick. This amp is a classic, is a model no longer made, and this one was used minimally.
My boy is asking $700 for a tough to find system that would cost you about $1400 to put together @ todays prices. He spent about $2200.
Yah, I told him he got took...
Anyways, reply or holla @ me if ur interested.