I was recently trying to purchase a domain of WordPress and it was costing me around $600. A friend of mine suggested that I should download the Scout extension and that could save me a lot of dollars. I was skeptical about using it. I was not ready to believe that it could give you a discount coupon on something like this.
To my shock and surprise, Scout saved me $350 on my cart value. It searched for all the possible codes that I couldn't find with a general search over the internet.
Since then I have been using it extensively and have saved dollars every time I buy something, be it groceries, clothes, pet food, or medicines.