OfCourse:
As a side point, since you wrote “I recently made a Shidduch with a BT and they gave me a K’aroh for Pesach that I believe costed them about a hundred dollars and I was thrilled with it.” Then from your own admittance in saying this one can infer that you will be happy with about $100, since that was the rate you charged for this shidduch.
And to answer your question “and there just arent enough Shadchanim who are willing to do it for free. Are you willing to start?” The answer is OF COURSE. But I don’t match up strangers. I match up friends, people I know. I am extremely happy when my friends get married and I would not dream in a thousand years of ever demanding a cent from them for THEIR happiness! I think that is rude and ungrateful.