Mobile phones aren't all that mobile when it comes to switching carriers—or even owners. It may seem like a no-brainer to accept a hand-me-down phone from a friend or family member or buy a used ...

Indeed, some of the earliest mobile phones now hold tremendous ... may fetch up to three times the original sale price.

The market for refurbished phones is taking off. Apple should be scared. "Every once in a while, a revolutionary product comes along that changes everything," Steve Jobs said when he unveiled the ...