It also depends on the shop and their special offers. I'm fairly sure scan, where I get my parts from (when I'm not stupid enough to buy a dell), once had a sale on the 2500k which brought it cheaper than the 2500.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT