DBRoth via Amazon offers the Ivation Portable Rechargeable HDMI DLP Projector, model no. IV-MP50, for $399.95. Coupon code "HWI699NS" drops it to $299.95. With free shipping, that's $300 under list price and the lowest total price we could find. It features 100 lumens, 854x480 (WVGA) native resolution, HDMI (MHL) input, and a 3,800mAh rechargeable battery. It measures about 4" x 4" x 1".