If you want to buy a player, bid for them about 1 or 2 million above the asking price. This ensures you of signing that player. Players that are worth buying include:
Alexandre Del Piero
Ruud Van Nistelrooy
In the first year, it is almost impossible (unless you bid over 5 million above the asking price) to buy Thiery Henry, David Becham, Ronaldo, and Del Piero.
Create a team with the following players. Note: The players are expensive so you might have to sell some of your best players first. The subs are up to you.
RB: Michel Salgado (Real Madrid)
LCB: Fabio Cannavaro (Inter Milan)
RCB: Alessandro Nesta (AC Milan)
LB: Roberto Carlos (Real Madrid)
LM: Zinedine Zidane (Real Madrid)
RM: David Beckham (Real Madrid)
CAM: Ronaldiniho (Barcelona)
LF: Ronaldo (Real Madrid)
RF: Theirry Henry (Arsenal)