Ahhhh interesting comment, because ive done some research regarding this.
Ok so what i did was use CoachParrot, on each of these players and took their stats if they each got 100% training (according to CoachParrot) for the next 3 years.
Then i took those stats, and did some very confined searches on the transfer market.
Interesting results!
Guard 1 - $1.5m
Guard 2 - $2m
Centre 1 - $2m
Centre 2 - $1.5m
So essentially, the same. So i checked out what each player was worth NOW, and again, there was very little difference, except for my PG who was about $100k more than the other players in the market. (Though, current transfer market may indiciate different results at different times of year, so bear this in mind).
So really in terms of purchase cost, for a player with the stats that i want (ie: The 'in 3 years time trained value and age), purchase cost would be the same.
The BIG difference was salary. (according to CoachParrot)
Guard 1 - $25k
Guard 2 - $22k
Centre 1 - $50k
Centre 2 - $55k
INTERESTING! Learn something new everyday. All these players salaries are currently about the same, give or take $1-2k. But because of their secondary and tertiary stats, after 3 years of 100% training, their salaries are quite different, in fact the guy with the lowest salary now, ends up with the highest in the future.
Random dribble really, and it doesnt really answer my question..... thoughts anyone?