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In general, a seller will be looking at between 4% and 7% of the sales price in selling costs, and this doesn't take into consideration helping the buyer with their closing costs and prepaid expenses, if the buyer asks for this help and is obtaining mortgage financing to fund their purchase.
A Realtor helping a seller market and sell their home will itemize expenses to be paid at closing and will provide a "seller net sheet" to help see what net profit the seller will be receiving from the sale of their home.
As the seller, included in the net sheet expenses are the following (some or all may apply):