This document provides guidance on how to value a company for potential investment. It lists several factors to consider in determining valuation, such as business model, sales projections, costs and comparable transaction values. Methods mentioned include market, revenue and asset-based valuation as well as discounted cash flow. The acquisition of WhatsApp for $19 billion is examined, noting its $20 million annual revenue and 450 million active users. Terms like pre-money and post-money valuation are also defined.