The seller pays the majority of the closing costs here in Palm Beach County, which includes the new title insurance owner's policy for the new buyer.
If the buyer has a mortgage, most of the their closing costs are related to the loan (whatever the lender charges you.) Then you might have to escrow extra property tax and homeowner's insurance funds. The buyer is also responsible for taxes based on the amount of the loan, endorsement taxes, survey, appraisal, mortgagee's title policy, recording fees, closing fees, and possibly a transaction fee from your real estate agent.
The seller pays the commission for the real estate agent that listed the property, which is split with the buyer's agent.