3D printing with metal materials is pretty rare to see in consumer goods, so I'm not surprised at all that only 150 units were made.
Wow, that's in the more expensive CIEM price range.
FAD seems to emphasise the bass response, which is what the Shure SE846 also focused on. XD
The $1600 pricetag is for the initial sales pitch. Due to the limited numbers, I've seen a few go for above $2000, not including shipping.