Guso via Amazon offers its Guso 50-Mile HDTV Antenna for $21.99. Coupon code "MM5SYRUG" cuts it to $13.19. With free shipping for Prime members, that's $9 off and the lowest price we could find. Get free HD channels for life via this antenna that tunes to signals in up to 1080p and features a built-in amplifier signal booster and 10-foot cable. Deal ends January 31.