Original US made RE XXX18 $450 shipped...you dont get much better SQ than this its a dual 2 I also have a brand new Critical Mass 15 single 2 for $350 shipped....an Old school TC based aluminum cone Onyx 15 for $350 shipped...very high end SQ sub....
I've got a DC Level 3 with Level 4 Soft Parts rated for around 800rms but will take 1k daily with the right amplifier/tuning. $175 + Shipping still under warranty never been abused no marks or scuffs only seen 600w daily. did a 142 @ 35hz off 600w.