If you book through reps, its the same price unless you opt for the bus transfer which amounts to around 4E each. Dont bother, as no15 bus takes you for a 2E day ticket which you can use all day anywhere in the paphos area between Paphos and Coral bay.
There were no deals when we were there. day we were going to go it was raining so didnt bother, but some people did and they said the water was freezing, all their drinks and sandwiches were confiscated on the way in too. Prices were outrageous for lunch and you had to pay for lockers too. Under 12's were given a wristband to wear as the larger rides had age limits. They couldn't go on the rides they wanted so they didnt think it was worth the 120E they had paid!