all depends on age, scratches, what lights, How well built the tank is. if it was cared for, are the seems in good condition, what skimmer, sump, pump is it? lighting as well. i mean you cant bee too greedy i would say. But tanks dont really hold there value if its messed up. keep us posted on what other stuff there is and questions we asked. $1k sounds high, and half these people just shoot out money and spend too much on tanks and dont no the value of there tank. so who knows.