Well I received some Amadana bamboo ear buds today, I would think these must be the most expensive ear buds on the market. I found them on ebay used, though the seller said he had only used them a few times and from the appearance of the foam covers, earbuds and packaging, it was a very short few times. They are like new.
As to the sound, when I first tried them today they sounded muffled and then I realized I had on a recording I had not listened to before and it turned out, when using some trusted headphones that it was the recording. So onto something I knew, some good jazz. The sound was good, open and quite neutral. Now they sound a little closed in and the highs are gone. I think these have not even been broken in as they are going through stages in sound, as we are all fairly used to, so as to the true sound, I don't know yet.
The build quality is very good. The pivot points have allen bolts, tiny, tiny ones, and fit and finish is fine. The cord is black ruberized, which I don't like but durable and th jack is a high quality gold plated type. They rest well in the ear and stay in place even with quite a bit of movement. The screen over the drivers is just that a screen and not perforated metal. The buds can swivel but in a circle not angled and have rubber grommets at the buds and swivel point near the bamboo. All points where the cord enters the jack, Y connection and buds are rubber molding so that the cord will not be stressed at one point. It does have the J connection, which I don't like but it works.