The prices have seemed to fluctuate a lot among all the providers I looked at, I put off buying the tickets to spread the cost of the trip and we obviously didn’t need to sort fast passes. I’d definitely seen tickets cheaper than I’ve got them for before although I can’t remember from which site. - So they might not always be more expensive just because they were this week!
Apparently American Attractions were running a promotion that is ending this evening - and it might just have been cheaper on the combination of tickets I was looking at. ATD were very helpful and efficient, immediately agreed to price match (even though I felt cheeky asking ) I was really impressed by their customer service.