Not the grandparent, but in the Netherlands it is 259€ ( https://www.microsoft.com/nl-nl/store/d/windows-10-pro/df77x.... ) that is 317USD in the conversion, so that sounds about right when you don't live in the US.

Of course, these European prices already include sales tax, which the US prices don't, but even then it would still be ~250USD without BTW.

So 270USD on sale sounds like a decent savings!