In case you missed it, this "special edition" Core i9-13900 has a maximum turbo clock of 6GHz.

In the same store, as reported by Videocardz.com, the Core i9-13900KS, priced at €799, is €124 more expensive than the Core i9-13900K and €144 more expensive compared to the Core i9-13900KF. Bear in mind that the Netherlands has a 21% VAT. The listing was pulled down but the store claimed it can ship it out tomorrow. 

The Core i9-13900KS is rumored to officially launch on January 12th, but it appears that some stores have decided to jump the gun.