Here in Czech Republic (which is semi-eastern europe), Lumia 520 is 50 % more expensive than ZTE Open C, and 8 GB Moto G is twice the price.
Now, Lumia 520 has better camera and perhaps better screen and CPU, and Moto G is whole different matter (720p, quadcore, 1 GB RAM), so the prices make sense. The cheap Chinese devices that you can get for the same money (like Huawei Y330) have generally the same hardware, so I don't think ZTE is overpricing the ZTE Open C.
So, while I can't give you prices, it's possible that the ZTE Open C is more competitive in markets like Eastern Europe or South America.
EDIT: the reason to get ZTE Open C instead of say, Lumia 520 or Huawei Y330 would be that FxOS devices should have better browser performance for the money, at least from the impressions from the SVG comparison video, and the browser seems to be much better integrated to the system than on Android or Windows Phone.
Now, Lumia 520 has better camera and perhaps better screen and CPU, and Moto G is whole different matter (720p, quadcore, 1 GB RAM), so the prices make sense. The cheap Chinese devices that you can get for the same money (like Huawei Y330) have generally the same hardware, so I don't think ZTE is overpricing the ZTE Open C.
So, while I can't give you prices, it's possible that the ZTE Open C is more competitive in markets like Eastern Europe or South America.
EDIT: the reason to get ZTE Open C instead of say, Lumia 520 or Huawei Y330 would be that FxOS devices should have better browser performance for the money, at least from the impressions from the SVG comparison video, and the browser seems to be much better integrated to the system than on Android or Windows Phone.