 What's better than buy one, get one free or discount offer? Hi, John and Jeannie Goldbeck, owners of your local Window World. At Window World, you get our very best price right up front. And our price always includes professional installation and our exclusive lifetime limited warranty. Right now, get 10 high-performance energy-saving windows for $6560 installed. Visit one of our showrooms or go to windowworldnorthdel.com or windowworldharford.com to schedule your free in-home estimate.