It is not uncommon to be buying things online these days. With Amazon Prime it makes buying online worthwhile for those that simply don't want to drive to the store and bring it home when it can be delivered to your home for free in 2 days. The thing is we aren't always shopping through Amazon and when you are buying from some other website, be sure to check for coupon codes as you can quite often save 10% or more. I personally use retailmenot as my main go to but even a quick search for the website name and "coupon code" through Google will typically result in a few other coupon saver sites like fatwallet or promo-code-girl .
The main thing is BEFORE you pay for the item, check for the "promo code" link as you will need to enter it there to see the final balance due.