@botvolution Yeah it's ostensibly very high-spec, "MIL-STD" wire… although I've read the referenced MIL-STD and it's not that impressive. Most commodity wire should pass if the manufacturer isn't using junk insulation or something.
I think they are basically preying on commercial buyers who just want to get everything from one place and don't know better (or are spending their employer's money and don't care).
For everyone else, there's… eBay, I guess.