I bought a Spirooli back quite a few months ago (just before spring) that I found on Ebay. Was brand new, sealed, all that good stuff.
With shipping I paid $6.50 for it.
I also happened to get a great dehydrator for $30, a sprouter (tribest) for $45, and a juicer (also a tribest) for $180.
All of them were brand new, sealed, full warranty, etc.
I have a hard time paying retail for anything anymore!
Really, though - $13 is a good deal on those. I think I happened to get lucky with mine, so you might want to just go for it!