Deal Parade via eBay offers the refurbished Yuneec Breeze 4K WiFi Quadcopter Drone for $99.99 with free shipping. That's $45 under our January refurb mention and the lowest price we've seen for it in any condition. (It's also $25 below the best deal we could find for a refurbished one now.) It features:
4K video recording
720p video streaming via the Breeze Cam mobile app
five automated flight modes
indoor positioning system
rechargeable LiPo battery with up to 12 minutes of flight time per charge
Note: A 1-year warranty applies, but it's unclear who backs it.
Making even one of these mistakes can easily cost you tens of thousands of dollars.