Liger Electronics via Amazon offers Prime members the Liger Ultra-Thin Indoor HDTV Flat Antenna for $24.95. Coupon code "DKG2M5LB" cuts the price to $14.95. With free shipping, that's $45 off list and the lowest total price we could find. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $6.27.) It features a 470 to 862MHz reception frequency and a 30-mile range.