Walmart continues to offer the refurbished Netgear AC750 Dual Band 802.11ac Wireless Gigabit Range Extender for $19.99. Choose in-store pickup to drop the price to $19.74 and avoid the $5.99 shipping charge. That's tied with our mention from two weeks ago and $40 less than buying a new one. It features data transfer rates of up to 750Mb/s, one Gigabit Ethernet port, and two external antennas. Note: It includes a 90-day warranty, although it is unclear who backs it.
None of these moves requires a big investment, and they all can save you money.