Sigh, I wish somebody would offer me a block like this... On the other hand - and hard to imagine - I saw something at least as nice today, but it is still too green....
Even if it is green it is still worth getting.
Just be sure to seal all the end grain and keep out of direct sunlight.
When you cut it up Koa dries pretty easily.
Just be sure end grain is thoroughly sealed or you will get a lot of end checks.