Amazon has the TP-Link Deco Whole Home Mesh WiFi System for $96.99 with Free Shipping for a limited time.

The TP-Link Deco M3 provides coverage up to 4,500 sqft, usually enough for an entire home. The 2.4GHz and 5GHz bands utilize MU-MIMO technology to provide you a more stable, reliable network with faster speeds and seamless roaming. If you need more coverage, simply add another satellite unit.