I know you are wanting used. Do you realize how much a tank alone that size cost new? Just the a RR tank is $1000 plus so getting a whole set up for $700 is going to be very hard.Looking to do some up grading want to get a little cat shark read they need 200-300 tank. Looking for lighting, tank sump , stand and skimmer. Budget puts me at about $700. Is this feasible? Thanks for looking