Gearbest price tracking sensor

Very nice, thanks!

Not working here:

2017-11-09 19:01:59 ERROR (Thread-4) [homeassistant.util.package] Unable to install package gearbest_parser==1.0.4.dev1: Could not find a version that satisfies the requirement gearbest_parser==1.0.4.dev1 (from versions: 1.0.0, 1.0.2, 1.0.3, 1.0.4)
No matching distribution found for gearbest_parser==1.0.4.dev1
2017-11-09 19:01:59 ERROR (MainThread) [homeassistant.setup] Not initializing sensor.gearbest because could not install dependency gearbest_parser==1.0.4.dev1
2017-11-09 19:01:59 ERROR (MainThread) [homeassistant.setup] Unable to prepare setup for platform sensor.gearbest: Could not install all requirements.

I placed the gearbest.py in

\HASSBIAN\homeassistant\custom_components\sensor