Has anyone else started comparing local prices with online sourcing options?

I have noticed that some everyday items have become way more expensive in local stores than they used to be.
To understand the difference, I have been trying a few tools that compare prices across different regions. One of the tools I tried recently was Redcart, not for buying, but just to check how big the gap is between factory prices and what we see locally.
The differences on some items were honestly surprising.

I am curious do you compare prices before buying, or do you mostly shop locally?