It's like this.
The electronics section of any of these stores is always shit. What little they do have will be the worst products being sold at the highest possible markups. Anybody with 2 brain cells to rub together knows that 99.9999999% of the best deals are online and the pirce difference is often significant. To stay profitable, these businesses rely on people who don't know any better and just buy whatever the employees recommend.
But as upgrade cycles slow down and people are become smarter shoppers by consulting, social media, forums, etc. they learn not to fall for this crap.