My wife caught the saltwater bug and set up a redsea 170 with sump about 9months ago. Now that she knows she likes the hobby she wants to upgrade tanks so she can get some fish she actually wants. plan is to sell this and buy one of the new Nuvo 100 int tanks. So how much would you guys say a newer used redsea would go for? I've found some for around 800 with pump so I figured maybe start with that and see what happens