At about 50 seconds in the video in the original post, he shows off the front soundboard of the ukulele. The first impression is grey, but it really is a palette of colors with hints of gold, tan, green, and grey. In person, it is captivatingly beautiful in appearance. The photo in post #5 from his FB post is less "accurate" in its appearance.
I have firsthand experience with this wood because Allen at Barron Rivers built from this tree on my custom concert. But when I received it and requested it for a soprano, he said his last pieces were spoken for.
So if the scale and tone (sounds great for fingerpicking in Mika's video for Ukulele Friend, see post #4) suits you, I would recommend you jump on this. Price is much lower than I would have guessed.