Good Morning msmucci,
Sellers closing cost are a product of the purchase price as most of the costs are calculated as a % of that number. Typically here on the shore if you figure 7% of the purchase price plus any concession paid by the seller to cover the Buyer's closing cost you will be close.
when I list a property for sale a portion of our discussion will cover closing costs and net proceeds.
please don't hesitate contacting me if I may be of further assistance
410-924-0901 - email@example.com