Come April I'm taking the family to Hawaii for a couple of weeks R&R. While in Maui I'll partake in a couple of days windsurfing

. I plan to hire the gear with a view to perhaps buying a second-hand board. The prices for 2005 gear looks quite good, approx $800 AUD for a JP Freestyle Wave.
First Question: what condition are they really in? Are hire boards likely to get a thrashing? After all, Maui has sailable conditions all year round.
Second question: If I do buy a board what precautions do I need to take to haul it back with me on the plane? Do I need special packing?