We're opening up a can of worms here Peete
The big box chain electronics cables are almost without a doubt
Monster Cable. That's their wheelhouse, selling overpriced junk to people who are told they "need" them, and how Noel Lee affords his Ferraris. MITs are not as exotic as they seem. The metals they use are nothing particularly special (mostly silver plated copper), and at least inside the Shotgun and Magnum lines are just zobel networks. It wouldn't cost a fortune at all to make that kind of thing, just a bit of electrical know how. The Oracle boxes I think are a bit more involved, they better be for that kind of cash. MIT has never been known as being any kind of great value, in fact if you're looking for somebody to blame for the current environment of 5 figure cables, well you can lay that blame at MIT's doorstep.
That said, Spectral swears by them, and I definitely have respect for Spectral's audio engineering chops. I really don't like
Nordost's flatline cables because they are so darn delicate. Also, the
Nordost house sound is bass lean and treble tilted, which doesn't appeal to me at all. The stuff that Audioquest sells for a few hundred bucks is decent, but I wouldn't go much further than that with them. Audioquest never changes their wire geometries, ever. They just change names and colors, and they added that silly and useless battery system to make a buck.
Brands I like: Audio-Magic, Kimber Select, Kubala Sosna, and Siltech. I've also heard extremely good things about 6Sons Audio, but I have no personal experience with them. In my system I use Kubala Sosna Emotion and Siltech Classic Anniversary.