Never installed 6NM410 $100 plus shipping (cost varies depending on carrier. I can use USPS, FedEx or UPS). I have the original box as well. Will be shipped inside another box with ample padding for protection.
Bought it new through my local music store (think they order via Loudspeakerplus). Was going to build a satellite for my 15" sub but decided to go another direction and also am putting some funds together for either a Peavey IPR or an Behringer iNuke with DSP.
This is an amazing little mid that is used with fEARful and other designs. It is identical to the 6ND410 which is no longer being distributed in the US except for a slight decrease in sensitivity.
Here are the specs for the 6NM410: http://www.talkbass.com/wiki/images/5/57/022068N410.pdf
Here's the 6ND410. http://www.eighteensound.it/index.as...simple&pid=244