Corsair Vengeance LPX 16gb DDR4 DIMM for sale
AKSHUALLY I have two of them: it was intended to be a 32gb kit. ONE OF THEM IS DEFECTIVE. I am too lazy/uninterested in checking warranty/RMA blah blah. You can have them both. The 16gb stick that works, works perfectly. Just pulled from my Ryzen 1800X system.
Link to product page
$65 shipped anywhere in the US