I have a M&K V125 subwoofer that I purchased new. Aesthetically it is in good condition. Working condition is excellent. I have never had a problem with this sub and it continues to play very accurate and tight sounding music. It also is an excellent home theater sub. This sub was purchased for about $800 new. I have the original owners manual but not box. Here is some additional info: http://www.mksound.com/v125.htm I would like to trade for either a high quality a/v receiver 5.1 or greater with 100 wpc or higher. Preferably a Denon or other well respected receiver. I would also consider a 5 channel amp. The catch is you would need to be local (or within reason) to the Dallas/Ft. Worth area. I will not ship a subwoofer that weighs this much. Thanks for your consideration.