I have four of these I was using in an OB configuration (see gallery photos), where they worked really well. I have cleaned the drivers as well as possible, but the cones are coated in a somewhat sticky material that picks up dust/cat hair really well.
Specs are available
here.
Asking 90/ea plus shipping. Will sell all four together for 300 + shipping.Asking 75/ea plus shipping. Will sell all four together for 250 + shipping.