His works are rare, and were considered valuable even when he was alive.
They tend to hold onto a large number of items that most people would consider not useful or valuable.
The devils were the most common and considered not valuable.
Almost every part of the cat was considered valuable, and in some cases, sacred.
The work as a whole is considered very valuable.
Just about everything he'd ever considered valuable was gone.
Because so few were ever produced, it is considered highly valuable among collectors.
He'd learned about all that he considered valuable, what little it was.
The prints are considered valuable because they were made by the photographer himself.
No color or pattern is considered more valuable than another.