Saw You at Sinai offers some guideline with footnotes that reference halachic sources on http://www.sawyouatsinai.com/laws-of-matchmaking.aspx
On the top of the page is: LAWS OF MATCHMAKING
Now: appealing as the idea is to split the shadchan's fee equally, I get the impression that such is not the common practice among professional shadchanim who tend to charge the young woman's side of the family 100% of the fee or even a few thousand upfront just to take the time to enter her into their data banks. Those of you in the parsha, as they say, have you found it to be so?
Related post: http://kallahmagazine.blogspot.com/2012/08/shidduch-dating-tips.html
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