About a week ago someone found this sub and thought it looked pretty good:
NEW STEREO 12" DUAL VOICE 4 Ohm 12" 1400W CAR AUDIO SUB SUBWOOFER 1400 WATT M2 | eBay
I ordered one for shits and giggles and honestly, I'm really damn surprised. Here's a few vids:
unboxing - YouTube
First run. Keep in mind this thing was STIFF when I first got it, so this was more of a break-in. 2 ft^3 on an ap-1800.
first run - YouTube
And finally ported (sorry for the camera work on this one):
secondrun - YouTube
I'm really happy with this thing. It pounded in a very non-optimal setup, and sounded great too. The only thing I noticed was a lack of lower (sub 40hz) output at first, but as the suspension loosens up it's getting better and better. I ordered 5 more for the wall rebuild.