If its stainless steel at that price you can't go wrong! The stainless Mui seems to be going for around $100 on the net..
I have a Borner, made in Germany.. 18/10 steel blade but heavy plastic body, not stainless.. And no legs for support like the Miu you saw.. I use mine a lot.. Can't beat them for fast slicing and fast clean-up..
If you're interested, heres the MuiFrance website with video's on knowing and using the Mui mandoline.http://www.miufrance.com/Mandoline.htm