Contracts and customer lists are worth a huge amount if the seller signs a non-compete agreement (which bars him from opening the same type of business within, say, a 100 mile geographic radius), and a non-solicitation agreement, saying that he won't solicit the customers on the list. Customer lists alone can be worth about 2 times annual gross revenue, but it is virtually worthless without a non-solicitation clause. Another factor that plays into consideration is how dependent the company is on the owner. If everything revolves around the owner, customers will be very attached to the owner and won't want to move on to the new company. At a larger company, if there are multiple crews run by multiple foremen, customers are more attached to the company brand than the individual, which makes the acquisition much more likely to be successful, as long as the majority of the employees stick with the company, and this makes the business more valuable.