If you import stuff without paying VAT and import duty, that's illegal. That's what it seems is happening here. It's the same old pattern whereby they claim their prices include VAT, but by a strange coincidence the prices are just what you'd get if you excluded VAT.
I don't have a problem with grey market imports. I do have a problem with black market imports, and that's what we're looking at here.
But you don't need to argue with me. There's no point because I'm not the one who's asking whether they are legit. If you don't agree with me, then just ignore me, go ahead and buy.