I paid $48 four years ago just as a walk up to the park entrance. Not sure if you can beat your price.
One piece of advice, don't buy any of the souvenir items in the park. I was staying at the Wyndham Orlando, had a strip mall kind of place across the street, and the same merchandise I saw at Seaworld was available there for half the price or less.
Funny - I am going there on an overnight adventure with Cub Scouts in a few weeks. (sleeping next to the shark tanks!) Generally we're told to get them thru AAA. Sometimes Coke or Pepsi also have promotions - often with a grocery store.
That reminds me. The first time we ever went we happened upon some cereal boxes in a routine grocery trip that had "Buy one, get one" deals on Sea World tix.
Unfortunately, MikeH...I haven't seen those for a long time.
IIRC, they give you a discount on a second day. It's a great place. Well-run and clean like the Florida Disney Parks. If you really want to do it justice, a second day might be right for you. We did it in one day...but had to miss some things.
Highlights that still stand out in my mind from several years ago are the seal & otter show, the Shamu/whale stadium show and the dolphin show with a Jimmy Buffet sound-alike guy.