Go to www.baseballtradevalues.com and scroll to About/Valuing Major League Players. Its a fun site to crawl around and in my observation, their methodolgy doesn't leave much room for subjectivity. Its also a good source for 'native' perspective on potential trade scenarios. is there room for disagreement? Sure. But, if you go back and review actual trades that have occurred, you'll find BTVs relatve values were very much in the bandwidth if not spot on.