Hi Kev, I have $828.58 including tax on Disney's own ticket on-line sales - you'd need to choose the option of collecting your passes at the Will Call window to avoid paying shipping. The quote says that's a saving of $48 on the gate price. (I didn't take it through to the check out as I'd have had to log-in etc so I assume that is the grand total).
It is certainly cheaper to buy them in advance.