The album apparently never received distribution to wider channels, and, as a result, is incredibly rare.

In the course of months we learned that an incredibly rare process was occurring.

Name an incredibly rare, swiftly fatal disease, and I've had it at least in my head.

To be able to think clearly is incredibly rare.

The fuel inside has also been known to explode , but this is incredibly rare.

It was first published in the "incredibly rare" Cleveland edition of 1880, which is believed to number only four copies.

This is an incredibly rare illness: only about 40 children are diagnosed with it every year in Britain.

It is incredibly rare when an honest-to-goodness hero comes to Washington to tell his tale.

These early pictures are incredibly rare, and this one was in pristine condition.

This suggests food poisoning, but of an incredibly rare type that the doctors have never seen before.