All parts for FPV flight can be purchased for $321 from Gearbest , or $361 if you opt for Amazon for some parts (see table below).
Footage of 79mph flight and the top video reviews follow the parts table.
Furibee Nebula BNF
Taranis QX7 Radio
Radio Handset Upgrades
FPV Goggle Upgrades
Dinogy 4S Lipo
Total Price = $321-$361
Total Weight = 460g
Thrust/Weight = 10.0 (4600g/460g)
Speed test and video review by UAVfutures
Video review by AndyRC