This thread helped me out a lot so here is my experience.
I am in the USA and purchased tickets from
Undercover Tourist. I got the 2 park park to park 5 day tickets for the price of 4 days. I got 2 adult and 1 child for $914.85.
These 5 day 2 park tickets at Universal website was $995.76.
After entering the park I went to Guest Services in Universal Studios and upgraded to 2 park seasonal passes (15 months) for us all which cost $974.46. Universal valued my UT tickets at $995.76 so they gave me a Universal gift card refund of $21.30.
So with the refund I spent $893.55 for 2 park seasonal pass for 2 adults and 1 child! Thanks to the Disboard members who helped me figure this all out. I can always upgrade the seasonal passes if we want to goduring a blackout time. This was the absolute best deal I could due in case we come back next year (really want to).