A pre listing home inspection can show you what problems there currently are with your home so you are not hit with surprises after you have negotiated a sales price and the buyer comes back with their inspection wanting items repaired. It is not necessary but it can be helpful.
We always recommend our buyers get a home inspection. In fact, we require our buyers to sign a buyers home inspection form if they do not choose to get a home inspection done. They will also need to sign a Buyers Final Walk Through Form before closing that also indicated they chose not to get the home inspection done.