CCALO, Thank you for posting in the Intel® Communities Support.
In order to verify where to buy the Intel® Core™ i5-9600KF processor, please visit the following link, select your location and you will see the Intel® resellers that are close to you:
https://www.intel.com/content/www/us/en/products/find-a-reseller.html
Regards,
Alberto R.
Intel Customer Support Technician
Under Contract to Intel Corporation