I recently moved and the new house has a Kinetico Model 50 water softener. I believe it is 8 or less years old and I know it was not cheap to buy and have installed. Our city water is high quality and I don't like the taste of softened water so we removed it. Are there issues with it sitting (full of water) for a period of time while I try to sell it? Is there a better way to prepare it for storage? Any tips on trying to sell a water softener system? The system has two tanks, softener valve assembly, bypass valve, and brine tank. I left the prefilter on my water system. Thanks!