Hi LittleGem,
Welcome!
Alas, John Tu only does some of the west coast shows. But there should be some good pearl vendors at your show, it is worth a look, I would think. The price they sell for depends on how good a price they bought their goods for in China, and that can vary from harvest to harvest. (There are two harvests per year, I recall.)
It should be a great chance to look at lots of pearls of all qualities and prices, find new shapes, etc.
Do you already have lots of experience with pearls?