Prices are reflected at B&H, but also at Amazon and other locations. The 3900X appears to be a permanent price drop while the others are perhaps temporary. Puts them about $20 cheaper than the 9900KF and 9700KF.
Microcenter has cut prices even more, with the downside being they're in store pickup only, and are less expensive than Amazon and Chinese Newegg as a result. Links are in the WCCFTech article, or you can just search on their site.
https://www.wccftech.com/amd-3rd-gen-ryzen-threadripper-cpus-massive-price-cuts-micro-center/
