I have a used, but in excellent condition TMA 1000.1, mono-block, class-D amplifier. This is JL Audio's cheaper line, but still a very good amp for the money. It's rated at 1000RMS @ 1ohm. Asking $150 + Shipping. I am a member of several other forums and would provide references upon request.
http://i183.photobucket.com/albums/x292/KSouthpaw/Car%20Audio/TMA1000.1Right.jpg
http://i183.photobucket.com/albums/x292/KSouthpaw/Car%20Audio/TMA1000.1Left.jpg
http://i183.photobucket.com/albums/x292/KSouthpaw/Car%20Audio/TMA1000.1Right.jpg
http://i183.photobucket.com/albums/x292/KSouthpaw/Car%20Audio/TMA1000.1Left.jpg