Some commercial due diligence questions to ask yourself and the vendor of a business when you start looking at buying a business or venture:

1. How much revenue has historically been generated - is this driven by unit sales or price increases?
2. What is the competition like in this sector
3. How often is the business marketed and does the marketing deliver revenue increases?
4. Is the business scalable...you want to be able to increase sales easily without having to add significant costs and resources
5. How do customer perceive the business, does the business have a good reputation?