@ Hejst is correct
In auctions, you can have only some hint.
When going in auctions, make a sorting by the value.
Here for example
Brandt is a fast trainer. his value is bigger than Watson, an almost 6* player.
Keegan, the DC, is not a fast trainer.
After buying, you check the sell value and compare it with other players of your team too (do also the sorting by value)
Zatko probably after some training to get the 6*, will be at 129.200 K
Rousar seems that he is not fast trainer.
Tobollik maybe is 2nd class ft.
* You see that Zatko's wage is little bigger than Rousar so probably a smaller factor- but that doesn't exist anymore.