FSBO, is a generic term that simply means a homeowner is selling their home without the help of a Realtor®. FSBO's are primarily used to save sellers the 6-7% commission that is usually paid to a listing agent. In this situation, the seller is responsible for marketing their own home. This includes all advertising, open houses, and negotiations with potential buyers.
In a FSBO sale, it is still possible that the seller may be asked to pay a 2-3% commission to a Realtor® on the buyer's side. Before the seller shows his or her home to a buyer's Realtor®, they should decide if they are willing to pay this commission.
However, it is not necessary to have a Realtor® on either the buyer or the seller side of a real estate transaction.