If you pro rate the cost of the ruler over the number of runners you'll make, then it isn't much. I paid $20 for my ruler and Cheryl at Phillips Fiber Art included the pattern and shipping as a Christmas special. I've made four runners and have 4 more planned, so that's $2.50 each. They are like potato chips - you can't make just one.
The posted one is very pretty. Now another color combo I want to try, LOL.