There are many reason a home seller may want their home appraised.
One is to establish a baseline from which the words of the visiting REALTOR can be compared.
You will find there to be many benefits to contacting a local lender (portfolio lender) that your REALTOR recommends to complete the appraisal. Don't allow the buyer to choose a big bank lender who is certain to inflict pain in the home seller, if they close at all.
Best of success,
Annette Lawrence, Broker/Associate
Palm Harbor, FL