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Black Friday not the cheapest time to shop, says consumer group
(www.theguardian.com)
This is a most excellent place for technology news and articles.
There was an article a couple years back saying that manufacturers will use cheaper components for the same products, making it LOOK like the same TV but it's actually built cheaper. The really bad ones will keep the same product number/SKU but others will usually append a letter or two.
So the over all cost might be less but you're actually getting a poor quality version.
I feel like most retailers also mark up the prices a few months before than just bring it down to retail price