I have been with friends who have bought machines at the Vermont Quilt Festival. They definitely got great prices on the machines and the dealer brought the machines to our car. The price is a huge advantage to getting them from a show, but definitely service and classes should be taken into consideration.
SewAlice has a great thought of calling the dealer to see if they can match the show price. That way you can get a good price and the LQS can get a sale and some business from you.
Good luck! :thumbup: