Unrealistic Sellers 
An inspection at the time of listing can also help a Realtor deal with a seller who has unrealistic expectations. The inspection report is good ammunition for explaining why one can't ask top dollar for a house that is not in top condition

Repairs Prior to Sale 
Sometimes the home inspection will reveal items that should be repaired immediately. A pre-listing inspection allows the seller to repair the condition prior to putting the house on the market. If the inspection occurs after the Agreement of Purchase and Sale, the purchaser could walk, renegotiate or, depending on the inspection clause, the seller may have an option to repair.  This may cause an undesirable delay in the sale for one or both parties.

Avoid Renegotiation
 In a buyer's market, most houses have to be sold twice. It takes a lot of work to get a signed Agreement of Purchase and Sale. Then the home inspection is performed and the purchaser wants to renegotiate. If all parties know the condition of the house prior to the offer, there is no need for re-negotiation.