I thought I'd give this another try:
Tap Water Purifier:
This is also brand new. Purifier comes packed with DI resin. $45 dollars at J&L. $35 OBO.
Tap Water Purifier Refill:
Refill for the above Tap Water Purifier. $27 at J&L. $20 OBO.
$50 OBO if you buy both items together. Would work great in conjuction with an existing RO unit, or if the TDS reading of your tap water is fairly low.
Any reasonable offer will not be refused!
-Rich