You can have a new DXZ785USB for that price online. 3 real preouts (all R&L), 6v, and it can do individual speaker gain in 2 or 3 way mode. It is pretty ugly by most standards.
I don't like to use my amps for speaker gain because I don't have a gain on the amp for each speaker, just the pairs I have hooked to that amp. Using balance and fade is a pain because any change impacts the opposite speaker.