Thanks for the list. For mid-Feb. the car rates are sky-high (yup - within the North East school break calendar). Right now I have Avis at $228/week/intermediate. Just tried the above codes and got the following rates before free-day coupon....

J868801..........Florida Visitor Bureau = $228.20
K199060..........Great FL Rates = $636.29
Z001181..........Good FL code = $345.13
D454000..........Disney123 - international, too! = $636.29

Crazy.