I actually did look at custom pricing. Even with shipping and low iron glass it's $100 cheaper for a 48x24x24 and $200 for a 48x20x20. It's not so much the tank price that has me scratching my head, it's the flat $300 shipping they are charging. I rant it thru my shipping quotes and the most expensive I got was $78.
Oh and aviod glass cages like the plague.