Wow, what a clever thing to think of… I’ve been looking for something to do that on my phone for years and never thought of looking into SMS stuff. That said, I found a list on TechCrunch with a couple good ones, looked it over, and I think (without using one, just design-wise) that mobsaver looks the best. There’s a bunch more on google if you search for sms price comparison.

There are many websites available that offers price comparison. You can use them to compare price easily and without any application.