I have a used standard dimension 90 tank for sale or trade. The tank is old but Harrison Ford/Indiana Jones said it best when he said "It's not the years, honey, it's the mileage." The tank is from the 90's but only has about 6 years of use. It has been properly stored, silicone is in great shape, and only minor scratches.
I last used it as a temporary tank when upgraded a year or so ago (from a 50 to a 75 gallon). Before that it was a baffle-less sump for about a year.
Here it is as a sump...
and one of the glass center brace...
I would like to get $100 for it, but would entertain trading for equipment. I'm specifically looking for a calcium reactor (or components), Reefkeeper modules (or systems), Tunze 6055, or other good stuff.