A local supplier in my state jacks their prices up between 15 and 45 percent depending on the product whenever they are at a show. Their logic is you are saving on shipping so they can charge more. I doubt they are turning much of a profit on the shipping portion of their operation anyways. So ask yourself if you were in their position, do they sell it to you for regular price or do they sell at the show for more?

Whenever a situation doesn't make sense, 999 times out of a 1000 the answer to the question why, is money.