I have a pair of these I purchased to use but they consume a bit more space than I can afford.
Killer subwoofers that have 12mm linear one-way xmax with up to 28mm one-way mechanical throw. Tons of output capability.
These were only removed from the boxes for test fit purposed. They are BNIB.
MSRP is roughly $240 shipped, each.
I'm asking $195 shipped each, or $380/pair, shipped, CONUS.
These are now back in the boxes but if desired I can take them out. Otherwise, here's some pictures via google: