Common expenses include closing costs and any negotiated repairs from the contract.   Every sale is unique so there will be others based on those negotiations and the final contract.

property taxes.

In North Carolina it's attorney fees, sales tax on the home, any repair costs pursuant to a buyer's inspection, home warranty for buyer paid by seller, any closing costs paid for buyer by seller, deed cancellation. Typically the biggest expense is the brokerage commission.

Legal fees, mortgage discharge fees, moving costs and commissions are some of the common expenses incurred by sellers.

In Hawaii the seller usually pays All Realtor commissions, 60% of the closing costs, termite inspection,  and any remedies required.

We have a net sheet that we share at every listing consultation.

In my County, Seller's title insurance, documentary stamps, commission and then it depends, whatever negotiated on the sale contract.

Commission... is a big one. Then add the cost of escrow, NHD, repairs, termite, home warranty, and the list goes on and on.

It depends on state laws and agreement of sale. 

Transfer taxes and pro-rated portion of property taxes in most cases. Transfer taxes can vary by location in terms of who is responsible, and new contruction will often pass that cost to the buyer...

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If the buyer needs closing cost assistance, the seller may be meeting those needs.