If you have old PC towers, laptops or printers sitting around, you can trade them in for free, and even get store credit in some cases. Old technology can be really hard to get rid of. Whether it's a decades old  laptop ,  desktop  or  printer  sitting around your home, you could probably use the space it's taking up. And there are easy and sustainable options for disposing of these if you're doing any  spring cleaning right now. Worldwide, people...

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