My roomate wants to sell his 2 JL Audio 10W3V2 dual 4's for a either a single beefy 12" or 15", or a nice mono amp. Sale price is $200 with the box. He'd rather sell them all together with the box, but if your offer is good enough, he may separate. The box is 1.25cf per sub, tuned to 33hz, dual chamber. It was custom built to JL's specs. Measurements can be taken upon request. They were powered by a RF T1001BD at 4 ohms, and were never abused.
