Sunvalleytek via Amazon offers Prime members the HooToo 802.11n WiFi Signal Repeater and Range Extender, model no. HT-WR01, for $29.99. Coupon code "JLUPJO8T" cuts it to $19.99. With free shipping, that's $30 off list and the lowest total price we could find. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $8.32.) It features wireless speeds of up to 300 MB/s and supports most types of security encryption.