Successful without investing real money!?

[t11_fan]

I buy him on auctions. They are the most expensive players on auctions. Their age is 18-20.
For example, my Celtic is now on level 12 where on auctions 5* players are between 20 and 30M. Fast trainers are over 40M worth, I've just found one which is 48M worth (shortlisted on screenshot).

Don't get me wrong, both strats have their pros and cons, personally I prefer fast trainers because I had few of them which played in my team over 5 seasons without investing much boosters.