Quality Cellz via eBay offers the refurbished D-Link 802.11ac Wireless Dual-Band Router in Black for $49.99 with free shipping. That's $9 under the lowest price we could find for a new unit. It features speeds of up to 450MB/s on 2.4GHz and up to 1,300MB/s on 5GHz.

Note: A 30-day warranty applies, although it's unclear who backs it.