Comment by GuB-42

Yes, it is common knowledge, but you need to get that information from somewhere in the first place, and why not a LLM?

And sometimes, common knowledge may be wrong, so it doesn't hurt to use LLMs, search engines and other sources to confirm that. Maybe you could discover that Best Buy has a problem with just the product you want, or any other reason. It doesn't hurt to spend a couple of minutes to double check and avoid losing $70.