Application fees are normal charges when applying for a rental property in Maryland. These broker fees, typically averaging $35-60 per adult applicant, cover the cost of the broker's leasing department to pay for services such as credit reports and application processing, including verification of employer, income, and landlord references. I would recommend asking the Broker what this application fee is used for and what happens to these application monies if your application is accepted or more importantly, rejected. You can always request to speak directly to an office manager too. Based on this, you should decide whether it's worth it to you to apply for this rental. Good luck!