I'm getting over 600.00 quotes for 11 days. This has never happened to me before using Costco to rent a car. (even for 14 days) Have I forgotten the tricks to renting through Costco or has it changed so dramatically that it is just expensive. I'm getting about half that as a quote through Discounthawaiicarrental. I used to be able to get the best rates from Costco. But it hasn't dropped at all in a week. I'm going end of April, beginning of May. What's changed with Costco?