This is a feeler at this point, but I'll be breaking down my 50g cube in the next few weeks. It's a standard starfire rimless (24x24x20h) I purchased new from clear diamond a few years ago, gently used. It's got a few minor scratches, but not noticeable when the tank is full. Stand is in pretty good shape except for rusted hinges which I'm sure can be replaced with Home Depot hinges if desired. They still work fine, just cosmetic.
Will come with tank, stand, sump with fuge compartment, bubble magus 3.5 skimmer, rio1700 return pump. Probably also an mp10 and a wp25 pump for tank flow. Lights I'm undecided on. No livestock or rock, it will be empty as I'm upgrading.
I'm thinking 350 at this point without the lights. If I add lights I'll let you know.
Let me know if there's any interest. Timeline will probably be two to three weeks before empty.