I have been keeping an eye on this one and they just dropped the price again this morning. Cheapest you will find anywhere. I love the fact that the flight controller is open-source.
CXHOBBY CX-20 Auto-Pathfinfer RTF Drone 6-axis GPS MX Autopilot System Open-Source RC Quadcopter for FPV UFO Aircraft Toy with GoPro Camera Mount (No Camera Included)
https://www.ebay.com/itm/291577573357
Price: $80.99