Invisible Shield coupons are available online - I Googled "invisible shield discount" and found
http://www.retailmenot.com/view/shieldzone.com with several codes for between 15% to 20%. The
20% code actually worked.
The prices at Best Buy are very high for only the screen version of the IS - about $20.00. I purchased the full body for about that, and a screen only for my wife's phone for about $9.00.
With that said, it has been almost a week, and I remain patiently waiting for my IS. As I noted previously, however, their customer service made it easy to replace my first IS, for my Creative Zen. It seemed to have been cut incorrectly. The replacement has been solid on that unit, for several years.
I hope this has been helpful.