This place is a trip. All used equipment, which if you're on a budget, makes this place pretty good. Most of it comes from Craigslist, so you sort of get what you pay for.
But they know their stuff, are friendly and give the BEST exchange prices on your fish in your aquarium. I had a panther grouper that had gotten too big and too aggressive for my tank. No where else in Phoenix wanted to touch Pig, he was a breed of fish much akin to a pitbull. But Discount took him, gave me $60 on exchange, and it worked out great.
Once in a blue moon if you're looking for a big tank, they have great deals. But they go fast, so get it while you can!