It's $81.99 for Prime members only, shipping is obviously free.
Ships in 1-4 weeks, I have ordered 3 sets and they show as arriving Aug 9-21, which I don't mind at this price, it's not going to get any cheaper by then.
It's 16GB set with 4 sticks in it, which is not ideal for many users, especially some Gigabyte boards that stop working when all 4 slots are populated, though X299 owners may appreciate 4x sticks. Speed is average - 2400MHz, latency 16-16-16 but some say it overclocks to 2800/15-15-15
Here is a review: