Open Question: Found a house to rent through friend, but realtor involved?

My friend, who I have know forever sent me information about a house one of her friends sister is selling/rent out. Besides being small, it wasn't a bad place. I meet the girl who is renting the property, problem being she wants to charge $2,000 to move in, plus 1st months and last months security of another $1,400. After doing research this is not typical, usually just 1st and security. I am thinking the addition $2000 is for the realtor commission, but she had nothing to do with finding us as tenants. Any advise. Thanks