For those who do some shopping on-line from your PC or laptop.
I just learned about Priceblink. It is a wonderful add-on and is available for different browsers.
You just do a search for an item, click on the link to the actual item, and Priceblink will flash a gold bar above the ad, showing where you get it cheaper, or other options. It is wonderful and I wish I had known about it long ago.
Before downloading it, you can watch a video of how it works.
Here is a link that might be useful: Priceblink add-on for Firefox