This have been rumored for a while in China and is almost a deal. MX3's current price is ￥1999/2199/2599 16G/32G/64G and the 128G version is not available right now.

However,Meizu is not a company open for thoughts or codes(sry for my English).
They have A LOCKED BOOTLOADER in all their phones since 2009, and is unwilling to change it. (yeah,they have their kernel souce on github, but what's the purpose of sources if you can't flash it..