Used Carver PXm-900--asking $200, but open to offers. Specs: 300 wpc/8 ohm, 450 wpc/4 ohm, 550 wpc/2 ohm, 900 watts/8 ohm (bridged mono). Works great, pretty clean cosmetically (a few scratches on the rack mounts). XLR and 1/4" inputs, 5-way binding post outputs, switchable sensitivity, high pass/low cut filter @30/50 Hz, and clip limiter. Copy of User's Manual included. I've used it to drive both 4 and 8 ohm loads with no difficulty.
Photos available via e-mail or viewed at
http://s1227.photobucket.com/albums/ee436/fhawk618/Carver%20PXm-900/If interested, call or text 412 722-6912
