D+D 100 GPD TWIN MEMBRANE R.O REVERSE OSMOSIS UNIT ?

FOR SALE I HAVE MY D+D R.O UNIT WHICH HAS JUST HAD ALL THE FILTERS AND MEMBRANES REPLACED SO IS AS NEW . THESE ARE THE TOP R.O UNITS FOR FISH KEEPERS . IT MAKES 100GPD OF PURE FILTERED WATER FOR ALL AQUARIUMS BE IT FRESH , TROPICAL , OR MARINE AND NOT FORGETTING KOI PONDS . THIS COST NEW 189 AS IT IS THE TWIN MEMBRANE VERSION ONLY ASKING 80 ITS WORTH MORE THAN THAT FOR THE MEMBRANES ALONE