It depends... there are still 2 players I'm selling after 5 times up without offer (one is a hard seller 31 but the other 26 is supposed to be easy, although I've sold 5 others already), and I picked up uncontested young players (two 5* one 4* of the position I wanted) with no issues.

Market is about value for the expanse... if you don't like the bidding wars don't join them they are for paying customers.
If you desperately need fresh blood that could keep you from being eliminated from the cup early, you may be out of luck...