some corrections........
email isn't going to do much as often Stern watch Pinside and they see lots of people complain about prices and vow not to buy but they do. The best thing to do is for people not to open their wallets and not buy a new pin if they don't like the price, Stern will then see a change in sales and may react differently.
also if you look at the number of features (targets, interactive toys etc) and compare this to most 90's Bally / WMS, the Stern Pro's have a few less features compared with the premium and LE. Also have to say I would not be surprised if their marketing guy Jody is behind many of the prices and LE's having a different game features etc. Sorry he is a goose and purely business not a pinballer. He is known to delete anything slightly negative from facebook posts and when was the last pin that was launched with a decent promo video before the pin was released to the public.