Fat Pitch Financials is a value-oriented investing blog written by an anonymous, amateur investor. Now, "anonymous" and "amateur" don't usually meet Seeking Alpha's selection criteria. But two factors make this a valuable source. First, the author focuses on careful analysis of publicly-available valuation metrics. And second, he has the experience (works as a resource economist) and education (undergraduate degree from Cornell in Applied Economic and Business Management, graduate degree from Yale) to do a good job. His approach is typified by Exploring Joel Greenblatt’s Magic Formula for Picking Value Stocks; read that and then his "moat checks" of individual stocks.