Let them think that. When they apply for the loan, they need to pay the $500 for the appraisal, and so they do. Zillow isn't giving them a loan with a 30-year term and low rates, is it? Their loan office does that, and the reason mortgage loans have long repayment terms and reasonable interest rates is because they are backed by the collateral value of the property.
Boo hoo, poor borrower, getting a loan to leverage a property purchase has to pay an appraisal fee, the lowest fee of them all. It is so sad....( sarcasm). They ***** for a minute, write the check, and forget aobut it. Buyers are under huge stress if moving with lots of things to think about, and refinancing people will benefit, and the appraisal fee is the price of admission.