I've been keeping it as a planted freshwater aquarium, but it will be just as easy to run it as a saltwater tank. I can't emphasize just how reliable and low maintenance this aquarium has been.
The tank itself is 72 inches wide, 18 inches deep and 24 inches tall. With the stand and hood, it's about 74 inches wide, about 20 inches deep and 60 inches tall
Comes with an Eheim CompactON 3000 (792 GPH) pump, 600W Titanium Aquarium Heater System from Bulk Reef Supply (includes Inkbird digital thermostat), all plumbing and bulkheads needed, 3-inch Poret foam filters (https://www.swisstropicals.com/filtration-shop/poret-foam-shop/) for the sump, glass tops for the main aquarium and sump, and an LED fixture bright enough to grow low-light plants. I can include the sand from the tank in 5 gallon buckets if you'd like.
You can see how it was set up here --> https://www.capitalcichlids.org/forums/threads/setting-up-my-135g-with-sump.36809/
I just moved all of the livestock and plants out of it, but still have it up and running with water and sand in it just in case you want to see it in operation and verify the condition prior to purchasing it.
I have a truck and I can deliver it if it's not too far away. Just a warning, though, I'm much more likely to be willing to deliver it the closer to $400 the sales price is...
Below is a picture from just after I set it up over 6 years ago:







