People often confuse Amish and Mennonite. Amish do not use electricity, or go into modern technology, but the Mennonite do. My mathematics professor at Penn State was Mennonite, and he was fully up to date on everything computer aided to do mathematical modeling and research related to technology, and was an author of many college level textbooks. I bet the run their long arm on the computer model. The main premise of the Mennonite is to be "in" the world, but not of it, and so that means in a modern area they have cars and other technology, but work to keep their focus on keeping their minds on Christ. These women probably see themselves as a blessing to others with their low prices.