The price for these has been $29.99 at all dealers for quite some time now. I bought mine at least 6 months ago for that price and find it quite useful. For solo gigs I leave the mixer at home and use just the goRack into a powered speaker.
There have been quite a few threads on this already:
http://www.acousticguitarforum.com/f...ghlight=gorack
http://www.mandolincafe.com/forum/sh...ghlight=gorack
http://www.acousticguitarforum.com/f...16#post5118116