Monoprice offers its Monoprice Maker Select Plus 3D Printer for $399.99. Coupon code "SELPLUS" cuts that price to $299.99. With free shipping, that's tied with our mention from last month and the lowest price we could find by $90. It features a single extruder head with 0.4mm nozzle, 100-micron layer resolution, 7.9" x 7.9" x 7.1" build area, heated build plate, 3.3" touchscreen LCD, USB, and SD card slot.