I've got 1 JBJ Auto top off unit for sale. Used for about 6 months. Works good. Comes with all brackets, sensors and Aqualifter pump. Has only been used with ro/di water. Price--$45
Also have 2 50g buckets of RSCP salt mix. Never opened. Price $15 ea. or both for $25. Changed salts and won't be using.
PM me if interested.