There will be an Easter sale followed by Spring Sale, May Day Sale, Cinco de Mayo Sale, Graduation Sale, Beginning of Summer Sale . . . .
See a price you like? Book it. Can get reduced till final payment. We book group space with a TA so refundable deposit.
PS, if the sales above don't sound great then how about Mid Summer Sale, 4th of July, August Sale, My Birthday Sale (21st of August) or ?????
Prices are a function of supply and demand. Really simple.