"provide reasonable access"?? It's simply a data collection exercise from publicly available sources.
You support my point. Whereas in the U.S. this trivial effort carried out by a third party unsurprisingly costs nothing, in Germany it unsurprisingly involves an inflated fee. As usual here, the consumer ist der letzte Arsch.
Whilst putting together a car sale on mobile.de you get to a point which
searches their own database for matches of similar sales ads as your own.
At this point there is a price suggestion based on ads from other people.
Note that these are obviously "asking prices"....
Why should a seller either have to go through hours of familiarizing himself or pay an 8 EUR fee for trivial information (as YorkshireLad paints it)?