I own a Rift S and before that a Rift. Both are great bits of kit though these days my kids pretty much dominate it, tag teaming between who uses it! Oh well least I have my PC and X bex Series X!
As for black Friday, the price of VR headsets has historically not budged at those times. You might find a bundle that includes a few titles though. I'd recommend the humble bundle VR bundle whilst it's still available for new headset users, it's great value and has some nice titles.