Transfer window - Best approaches for selling players

[Majick]

I'm at the end of the season, and looking ahead to the summer transfer window. I've had some success in previous windows with offering players at a low price and negotiating up, but I've not been able to clear everyone out, and now I have quite an accumulation of talent coming back from loan who aren't part of my plans. Between the loan army, first team players and reserves who have limited potential I have around 25 players I'd be willing to sell. I do get that selling so many in one window is going to be tricky!

So, before starting the window, I wanted to check on if I was missing anything obvious - I have a week until the English window opens, and a month until the European window opens. Should I be offering players out now, or wait until the window(s) open? If I offer a player out too many times, will their value drop - I've noticed that in previous windows, but I'm not sure if it's related? If I offer out too many players at once, would that effectively flood the market, or does the game not take that into account?

Edited September 2, 2023 by Majick