HTC is working on a plastic version of the One (M8)
 

The plastic version of the One (M8) will be significantly more affordable than the all-metallic variant, and will be available initially in China. HTC is looking to make a plastic version of its popular One (M8) phone, targeted at price-conscious emerging markets. The One (M8)’s aluminium construction is one of the best features of the device. [...]

http://vr-zone.com/articles/htc-work...version-one-m8