This was very briefly showcased in yesterday Unpacked Event but it's normal price is apparently 149.99 and its currently on sale according to an article from MobileSyrup. The price is apparently 104.99 at checkout which is a pretty good deal considering it was just released.
Update: It seems at this moment the only way to order the Wireless Charger Duo is to order the Note 9 and then add it as an accessory and then remove the Note 9 (if you want just the charger). Haven't found an option to just add the charger to cart.
