Amazon's Kindle Fire has been out long enough to build up a hefty stock of returned units; reader DeviceGuru writes "If you're quick, you might be able to snag a refurbished unit for $139 at Amazon. The company introduced the Fire at the end of 2011 at the loss-leader price point of $199, though it's rumored to cost around $210 to build. So at $139, you'd be getting the Android-powered tablet well below cost. Step one: buy refurbed Kindle Fire. Step two: root it and enjoy!"
For this price, I'd be out trying to hog a few of these, if they had GPS and at least one camera. Update: 03/29 19:37 GMT
: Reader Eldavojohn points out that this was a short-lived opportunity, now past.