Used P52. Works great. Specs in pic. Upgraded to 64GB of RAM. It has both a 512GB NVME drive and a 500GB SATA SSD.
It has a Windows 10 license embedded but I'm having some issues installing it. Unfortunately, I have run Linux for over 15 years and have no clue how to install Windows. As you can see from the photos, it runs Linux just fine so the hardware works great. Since setting up Linux would require setting up a user and password, it will come without an operating system. I'm sure installing Windows 10 or Linux should be straightforward.