Every time I've gone in to Best Buy, I've known more than any of the employees there. Obviously I'm not their normal customer, but some of the things they say are just ridiculous.
An older woman was looking at blu-ray players and wanted help. With no employees anywhere in sight, I volunteered my time to help her. As it turns out, she had no high definition tv or external speakers. She just wanted it because her daughter had one.
After she left, I was still looking at blu-ray players and I asked an employee what players they had with 7.1 analog outs. He flat out told me they didn't exist, so I showed him one on my phone...
The way I see it, if you don't have the best prices, you better have some well-educated employees. Best Buy has nothing going for it but selection, and even that is just limited to TVs.