I have a Coster RO for sale. It is capable of around 900GPH. It is going to need new membranes. Old ones are passing sugar. Have had it apart in the last year so end caps on the vessels are not to bad to take out. Has the Magkist 38 high pressure pump which is one of the best. Manual Controls so there is less to go wrong. All in all it is a good unit. Cheapest you will find a two post cause it doesn’t have all the bells and whistles. I have a copy of the owners manual from way back when as well. This is a great machine, very reliable. I’m in the U.P. of MI but I could deliver to WI, MN. Calling is the best way to reach me. 906 235 9127. Would be interested in trading for a 2x6 evaporator or similiar size as well. 3000 obo