Currently, Sony has A7 series full frame e-mount mirrorless cameras available on the market. Along with rumored high-end Sony A9 series FF mirrorless, it is also rumored Sony will announce a very cheap full frame E-mount mirrorless camera: Sony A5.
According to the source:
super cheap full frame beginner mirrorless is coming! 799 us for the kit.
The price for Sony A5 with lens kit is rumored to be $799.
Stay tuned for more info.