Ask HN: What is the best programmable drone, sub $400?

I'd like a nice, simple API where I can set relative XYZ position so I can program indoor flight paths. Here's what I've found:

• $3300 DJI Matrice 100, nice API with XYZ support, but pricey

• $550 Parrot Bebop 2, decent API but only supports yaw/pitch/roll setting

• $300 Parrot AR Drone 2 cheaper but API is ancient, docs are from 2012

• $180 Crazyflie, API looks quite rough, doesn't seem to have as nice stability stuff as other drones mentioned here.

• $179 CoDrone, kickstarter project with nice Arduino api not available until April

Would love any input on stuff I might have missed!