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Printrbot Jr Assembled 3D Printer, Maker Shed, $449

The first and cheapest in a series of low-cost 3D printers from epic crowdfunding success story Brook Drumm, the Printrbot Jr is the most portable 3D printer on the market and certainly the cheapest available in fully-assembled form. It’s compact, folds up to make it even easier to move and store, and performs as well (or even better) than printers costing three times as much.  It prints in PLA, only, and has a build volume of 4 × 4 × 4″.