The Vertex Puratek is $320 plus tax new. It is hardly used, I made about 100 gallons with it, works perfect, have the accesories it came with. I was going to use it witht he RSM 250 I had for sale (sold now).
I have the 200 gph Vertex for my main home system.
The RODI is this one:
http://www.jlaquatics.com/phpstore/s..._ID=vt-ro100di
I have it in Vancouver.
Tom