hi Frank, thanks for using Ghostery.
Eric is correct in saying that XiTi is the tracker thats causing issues, unfortunately, it is due to the fact that willhaben submits every large picture to XiTi. Sadly, there isn't much we can do on our end when a website integrates too tightly with a 3rd party that is a known tracker.
Until such time that we create a surrogate for XiTi, your only options are either to unblock it in Ghostery or add the entire site into Ghostery whitelist.