Almost everyone reading this has perused Google’s collection of satellite images, either on Google Maps or with Google Earth. Perhaps you’ve wanted to get a bird’s eye view of your own home or visually traveled to some far away political hotspot. But one place you haven’t easily been able to travel via satellite image — back in time.

At least, that was the case until recently. Last Thursday, to be specific. That’s when Google — together with TIME Magazine, NASA and the U.S. Geological Survey — launched Timelapse, a zoomable, interactive web tool that lets you easily compare satellite images taken between 1984 and 2012 of nearly any location.

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Spot Cool Stuff just got a new Apple iPhone. Which begs the questions: What should we do with our old one?

Turns out, that old iPhone is worth some money. There are dozens of websites through which you can sell old electronics. And not only iPhones, but MP3 players, calculators, gaming consoles, computers—both desk and laptop—external disk drives, cameras and camera lenses, printers, eBook readers, DVD players and more.

Once bought, your item will either be refurbished or recycled. So it’s a win-win. You get money for something you won’t use anymore anyway. And the planet gets one less toxic piece of a landfill.

After researching all the used electronics buying services we could find, Spot Cool Stuff found four that we can especially recommend. Here they are, in order of preference:

Note: The prices listed below are for a working 32GB Apple iPhone 3GS with a few small-ish scratches on the front and many more in back. Prices seem to fluctuate quite a bit. All the websites reviewed here will pay for your shipping costs but are based in the United States. In fact, for all but one you must be in the US to sell them your gadgets.

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