What tools do you use?

[andrewh]

Does anyone know the formula to calculate player value ($)?

I'd like something like x² + 1.2 * s - a, where x is buying value, s is skill level, and a is age.

There can't be any formula because players value differs according to their Training Speed......

I speculate it might be a sum of two terms.

One term is the player's current playing ability which would factor in quality.

The other term is the player's potential or possible future playing ability. This part would factor in the player's age, quality, and a training speed multiplier that would range from 0-3.0. Have you seen a training speed faster than three times an average trainer?

If you plot the quality and market value of 34 year olds (this would hold age constant and possibly remove the potential quality term), you may be able to fit a line to the curve and come up with an equation.