Developer United Front Games, makers of Sleeping Dogs, went out of business recently and as part of their bankruptcy, they had to auction off most of their assets. Which included PS4 dev kits.
One person managed to purchase a dev kit at the auction. And the dev kit was a newer version that supported PS4 Pro titles and graphics. Oh, and the dev kit was stuffed with over 800 GB of data.
However, the data is encrypted and cannot be accessed because the dev kit license expired. The license has to be renewed with Sony ever 90 days for security reasons.
As the image above shows, the dev kit is much larger than a regular PS4 and looks very different too.