I got it for a steal on eBay a couple weeks ago, I knew based on the part number it should have been silenced. I think the price stayed as low as it did because the seller didn't really advertise it as such other than mentioning the part number. I was willing to spend quite a bit more than I actually paid because these are getting so hard to find. Buying a new one from Amazon Japan would cost close to $340, I got this for less than half that.
Yeah, he did an awful job of advertising it. He posted it on reddit and ebay and everyone just assumed it was a the standard white variable, which no one really wants, but if you looked at his invoice pic/product link to EK, you saw he was offering the silenced version.
I almost battled for it just because of the value, but since I wouldn't have used it didn't make much sense to spend the money.