Newegg offers the AMD Ryzen Threadripper 8-Core 3.8GHz Processor for $399.99 with free shipping. (Amazon charges the same.) That's a $50 drop since our mention from three weeks ago and the lowest price we've ever seen. (It's the best price we could find now, also by $50.) It features a 20MB cache and 64 PCI Express Gen3 lanes.