Yard sales are beginning to become things of the past, but needing to purge your life every now and then is still super relevant. LetGo is an app that lets you upload photos and information about anything of yours you’re looking to sell secondhand. Your products will go in a database that those around you can search and buy straight from their phones. You, likewise, can search other neighbors’ items -- some go so far as to sell their cars through the app -- for some loot. One man’s trash, they say.