I don't know how mkreis could tell but I did notice that in one of the photos you can distinctly see the Puma logo[1] and I thought it was curious. I guess this explains it.

[1] https://ibms360.co.uk/wp-content/uploads/2020/05/DSC_0062-10...

It's the picture which duiker101 already pointed to, the description of the auction, which mentions a "Puma machine" and the fact that the room was cluttered with sports gear (mentioned in the article).

Additionally Puma was founded very close by and most likely the company was renting out / buying some office space for the accounting division.

It says in the linked article in the translated auction ad.

That linked with the logo would make sense.