I wrote Australian Dollars there to alert you to the currency exchange step you will have to consider. 12 speed DA chain AUD 130 = USD 90, 11 speed DA chain AUD 109 = USD 75.
The final price for a pre-waxed 12-spd Dura Ace chain, delivered to the U.S. from your source is US$132.80. So, again, we're talking roughly double the price of an un-waxed chain. It's great if you can get it for less, but for most people on this forum, it will cost them double to buy a pre-waxed chain.