There is one processor in the Ryzen 3000 lineup that is due for a release soon enough, of course, that is not just the 16-core part, but also the part with the fastest advertised boost clock,  the Ryzen 9 3950X. AMD indicated that the product would be released this very month, and that indeed does seem to be the case. 

So far in price search engines, the SKU is listed as 'AMD Ryzen 9 3950X, 16x 3.50GHz, boxed (100-100000051BOX)', however, there was no price or stock availability shown. There is one Swiss etailer website though that is listing the Ryzen 9 3950X to be available for 999 Swiss francs. Which is roughly 925~950 euros. With varying exchange rates and VAT that is in line with the mentioned retail price of $749 indicated by AMD. 

AMD Ryzen 9 3950X Spotted at etailer - available September 30th ?