Do you have any old cell phones gathering dust? There are easy ways to turn them into cash in your life.

We’re in the time of year that so many 2-year contracts are expiring and there’s a big push from the wireless carriers to get you to buy the latest, greatest cell phones. That’s only intensified with the iPhone 5 and the Samsung Galaxy S III.

People who buy these phones want to be cutting edge, and chances are the phones they already had were pretty fancy.

Don’t let those unloved phones sit and gather dust! In addition to old standbys like Craigslist and eBay, you can try these sites when you want to sell an old phone:

• Swappa.com for Android devices
• Glyde.com for gadgets and games
• Gazelle.com for Apple products, plus Android, BlackBerry and other phones
• NewtonsHead.com for Apple products, even damaged iPhones
• BuyBackWorld.com or BuyMyTronics.com for all electronics
• NextWorth.com for phones, cameras, tablets and games

But those aren't the only options. Coinstar is testing a kiosk called ecoATM.com that uses artificial intelligence and extreme digital photography to determine a value for any electronics gadgets you want to sell to the machine. You can get cash or cash equivalent on the spot.

Meanwhile, Amazon is offering Amazon gift cards if you trade in a fully functional iPhone. They're paying $85 in gift cards for the iPhone 3, and up to $500 for a well-preserved iPhone 4S.

Finally, Sprint is doing something for those who lose or have their phones stolen in the midst of contract. They will apparently sell you a used or reconditioned phone without extending your contract.