I do not necessarily advocate selling a home yourself for several reasons. One is that your home will not be on the Multiple Listing Service. Many corporate relocatees seek real estate agents who access the MLS for their clients, so you would lose that side of the market. That's not to say, however, that it can't be done because some people do so, and very successfully. The warranty can increase the potential for having a satisfactory sale.
Warranties are an important sales tool, especially if the resale market is slow.
Typically, sellers will purchase half of all warranties. Don't substitute a warranty for a home inspection, but consider it as peace of mind for both you and the buyer. When you purchase a warranty plan, be selective and examine the fine print. There are often several deductibles, and some warranties are more inclusive than others. When you get to the point of receiving an actual offer for your home, you can either accept it as it is or you can counteroffer.