For whatever it’s worth…
The following information is gleaned from extensive observation of the shidduch scene over a extended period of time.
Typical shadchanus (i.e. the amounts that are commonly given) in the Tri State area falls in the range of 1,000 to 1,500 each side. This includes Yeshiva people/Balle Batish etc.
In the heimishe community shadchanus is considerably higher.
In out of town communities typically a bit less.
modern orthodox community typically less (despite what it says on SYAS) Perhaps there are people who are trying to change that, but the change has not taken widespread hold yet.
This is simply a report of the realities on the ground.
As the posters have repeatedly stated, it is a halachic shayla and requires a halachic determination.
Often there are complicating factors such as more than one person involved in the role of shadchan. Or where one side is from one community and the other side is from a different community. Does it go by the standards/minhag of the community that the couple is part of, or does it follow the standards/minhag of the community the shadchan is part of.
These and similar questions should of course be asked to a qualified rov prior paying the shadchan thus ensuring that one properly fulfills their halachic obligation to compensate the shadchan.