Doesn't matter for how much (tokens and money) you bought player.
Only matters MARKET VALUE with accordance in AvQ (not stars, but exact percentage) of a player.
Extra position(s) and special ability don't impact payer's market value.

In your case fast trainer 18yo, about 80% on level 1, market value should be approximately $2.5M

Can't say anything about 19yo, because don't have such low level data yet.