In the UK, Which (a consumer group) did a study. I think 90% of products were cheaper or same price at other parts of the year.
The only thing cheaper is usually the shit that no one wants that they cannot shift, or those 5 TVs at the start of the day that make people believe there are good deals available.
https://www.which.co.uk/policy-and-insight/article/nine-in-10-black-friday-deals-cheaper-or-same-price-at-other-times-of-the-year-which-finds-a4Z2J3u5lTI2
Good luck.