what do you think of this RO/DI

[argileh]

I am now in the market for a RO/DI unit. I've been getting my RO/DI water from a purified water supplier. Initially I used to test the water every time with my TDS meter and it always showed 0ppm. Last week I tested the water when I got home and it showed 15ppm. This is really annoying since tap water here in Burnaby usually reads 11-16ppm.

Long story short, I want to buy a RO/DI unit. They sell at least for $300 at Local LFSs. I saw this one on ebay:

http://cgi.ebay.ca/ws/eBayISAPI.dll?...4309&rd=1&rd=1

Is ther any risk buying these units. Will it be a problem finding replacement filters for them.