There are several methods that can be used such as the Good, Better, Best system where you could show 3 different products such and Good = the Solution, Better = Gutter Topper and the Best = Leaf Terminator. Price them accordingly but the most successful way is to make sure the Terminator product in this example (or whichever product you choose) = Best is priced to be at a much higher rate than you normally would sell it at since this system is really designed to sell the Better product such as Gutter Topper in this example. By pricing whichever product you choose to be the Best product will allow you to raise the price of the Better product which will help you make more profit per foot. The very same method would apply for the Good product as well. People will automatically choose the Better product.