Tip - What Should I Do With All My Old, Outdated Computer Parts?

Dear Lifehacker, I have built many computers throughout the years, but as they've become obsolete I've replaced them with new computers. What should I do with all my old computer parts? I'd hate to just throw them in the trash.
Tags: Ask Lifehacker, Computer building, Hardware, Computer Parts, Graphics Cards, Hard Drives, Motherboards, DIY, Recycling, Repurposing, Top, shutterstock, Lifehacker