I have a single NHT M5 speaker that was purchased intending to use it as a center channel but my plans changed. It is new in box with grill (literally never used) and I'm now seeking a second one in order to have a left-right pair for stereo audio. My price range is $150 and it should be in excellent condition with grill. I am also willing to just sell mine to an interested buyer at $175 if there's interest. The point is... I have no use for a single speaker!