It is no secret that a well maintained, clean and appealing home has a far better chance of selling, at a higher price and more quickly than a home that could use some work and attention.
Keep in mind that first impressions always create lasting impressions - and nothing exemplifies this better than real estate.
Of course, this does not mean you need to embark on a major renovation project in order to sell your home. There would be no guarantees you would be able to recoup the costs of such a large and expensive project anyway.