Be familiar with the terms of any contract you give to a would-be purchaser. Consider the contract as a whole. If so, consult an attorney about making changes. Analyze the document as a series of paragraphs or clauses, each written to benefit one party or the other. If a low offer comes your way, remain cool until you've examined the terms.
Nothing evokes a more emotional response than a low bid.
Be realistic and objective because many properties don't bring full price. Don't use price alone as a reason not to counter or negotiate. The purchaser should have your home inspected for soundness of construction and state of repair. Include all mandatory and voluntary disclosure statements concerning the property's condition, such as known defects in the contract. Be careful what you guarantee.