unobtainable in a sentence

Brunei is a tiny Islamic country where alcohol is virtually unobtainable.

I bought this CD at a store a few years ago, but now it is completely unobtainable, and quite valuable.

The book is unobtainable because it is out of print, and any copies that do exist are in the hands of collectors.

To have such control at a young age seemed impossibly unobtainable, as did the price.