How would someone know this when visiting them for an occasional purchase? You might easily assume that the lower rated items rapidly stop being carried, that the items that are carried are curated to have a real bias towards higher ratings, or merely that the lower rated items are on a different page of results.

Which isn't to say I trust Best Buy's customer reviews, I definitely don't. I probably trust Amazon's more simply by sheer quantity combined with fakespot.com to sanity check the reviews.

But I don't think a website having weird average scores is very suspicious, especially when they have small numbers of reviews. If many items are totally unreviewed and others have only a few dozen reviews, the results are essentially noise right? That's why I would trust Best Buy reviews less.