Sole proprietorships often feature a unique blend of familiar valuation challenges, combining a very small business valuation with enigmatic considerations of key-person discounts and personal goodwill allocations, among others. In Valuing Sole Proprietorships, BV hall of famer Ron Seigneur and Brenda Clarke discuss how these all too familiar businesses can create some of the most perilous valuation assignments and what appraisers can do to overcome the obstacles they pose.