eBay has the Dell S2817Q 28" Ultra HD 4K 3840x2160 LED Backlit Monitor for $240 with free shipping. Features 3840 x 2160 resolution (UHD 4K) @ 60Hz, TN anti-glare LED panel, 2ms response, 2 x 9W speakers, 2 x HDMI, DP, mDP, USB 3.0.
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eBay has the Monoprice MP i3 3D Printer Fully Assembled MicroSD & Sample PLA (130441, eBay Exclusive) for $117 with free shipping. Retail price: $400.