When an offer comes in, you can accept it exactly as it stands, refuse it (seldom a useful response) or make a counteroffer to the buyers with the changes you want. In evaluating a purchase offer, you should estimate the amount of cash you'll walk away with when the transaction is complete. For example, when you're presented with two offers at the same time, you may discover you're better off accepting the one with the lower sale price if the other asks you to pay points to the buyer's lending institution.
Once you have a specific proposal before you, calculating net proceeds becomes simple. From the proposed purchase price you can subtract the following costs:
payoff amount on present mortgage
any other liens (equity loan, judgments)
real estate agent’s commission
unpaid property taxes and water and other utility bills
if required by the contract: cost of survey, termite inspection, buyer's closing costs, repairs, etc.
Your present mortgage lender may maintain an escrow account into which you deposit money to be used for property tax bills and homeowner's insurance. In that case, remember that you will receive a refund of money left in that account, which will add to your proceeds.