You aren't just buying a company, you're buying a job. In this blog post, the payroll expense is $250k a year. The founder is working for free 40 hours a week, acting as a software dev, managing a $40k advertising budget, developing the product, and overseeing the customer support team.

If you buy this company and hire somebody who can do all those things, that $235k of net profit becomes $0.

Buying it just to shut it down without continuing the product- eh- does your product really address all the needs of the customer base? Or will they go to another competitor instead?