I found a Samsung HT-WS1 Soundbar/wireless subwoofer at Goodwill for $50 a few days ago. It was marked "Untested, as-is, no refunds" so I thought it over for a bit. I happened to have a minijack cable in my Jeep for my phone, so I was able to test it. Worked great, so I picked it up.
After getting it home, and hooking it up, I realized that the left speaker has a bit of interference buzz. It turns out this is a common problem, and after messing around, it seems to be triggered by the wireless unit that communicates with the subwoofer. I opened it up and foiled a few wires, and it's helped alot, but there's still a little bit if it's absolutely quiet in the room.
I just finally got it integrated into the rest of my theater setup and it sounds pretty nice. I love the wireless subwoofer since I was able to just stick it behind the couch on the other side of the room, completely out of the way.
Not the greatest $50 ever spent, but not too bad.