Usually Walmart will sell the black Friday items at that price through the weekend unless it's a high dollar TV or something like that. My blu-ray player was a $29 black Friday deal and the store between work and home kept them at that price for almost a week. It jumped to over $80 after that. I stopped in and picked it up after work one night. It really came in handy when the living room dvd player died a few months later. If they have something that interests me at that price through the weekend, or available online, I'll bite. But there's no way in hell I'll run out on Thanksgiving dinner or head out at 4 am for that ****.
The screwups are also nice. While I was digesting Thanksgiving dinner a few years ago, I ordered my daughter a $28 tablet they had during the event. When I went to the store several days later to pick it up, I found out that those tablets never made it to the store so they gave me the next model up, a $100 tablet that came with a detachable keyboard.
My 40" Sony Bravia was also a black Friday item back in 2009. I stopped by there around 9 pm while on the way home from buying fence posts and they still had nearly a whole pallet of them. By today's standards it's a dinosaur but, it's 1080p and the fire stick works in it. One of the better $300 purchases I've made.