Valuing a business...how does THAT work?

One thing that amazes me, and I have seen it time and time again, is how business owners will leave their business for dead instead of trying to sell it - even for whatever little value it may have. There are many reasons business owners eventually sell their businesses: health reasons, a family move, and other business / family obligations are some common reasons for selling. Many times business owners are just looking for a fresh challenge and are "bored" with the business