I think the best way to get a discount from a dealer is to call and make sure you let him know that if he gives you a good price you will purchase from him and most importantly you will not be using his price as a bargaining chip with your local dealer. So tell him where you live and you have no dealers and you are in fact ready to purchase the amp, from him, ask him if he takes credit cards, if you intent is to use one.
Give that a shot
Give that a shot