im in the process of moving my fish into a new tank i just set up and will be selling my 125. i've had it running for about a year now with no problems at all, but does require some touch ups (new paint maybe) if ur going to put it where people can see. it's currently running with 1" DIY pvc overflow with a basic 55g sump. i messed up while making the drip plate and glued it to the two panels it's next to, so to take out the bio-media u would have to go from below, but other than that the integrity of the sump isn't compromised at all. dims are as follows 6' x 18" x 22" or something like that, but its standard 125 dims. the tank will come with stand+canopy, 55g sump, return pump, bio media, 1" pvc overflow, and is glass.
looking to get 280 for the whole shebang.
picture of it taken 5/11 currently running.

looking to get 280 for the whole shebang.
picture of it taken 5/11 currently running.

Goodluck on the tank sale.