As one of its daily deals, Best Buy via eBay offers the Insignia Slim-line Pico WVGA DLP Projector for $159.99 with free shipping. That's $40 off list and the lowest price we could find. It features an 854x480 native resolution, 100-minute battery life, and HDMI input. Deal ends today.
Before you spend another dollar on items and services like these, check with your public library. You will likely be surprised by what it offers for free.