We will happily sell you a player we don't want for a good profit.

Well, now that it's all agreed, we actually want a few million more.

Wait a bit, we're getting a new manager, he wants to see the player first.

The new manager wants him. Not for sale.

Wait, the new manager doesn't want him but we're going to massively inflate the price and sell him to someone else now.

Haha, our mistake, they don't want to buy him after all. Still want him?

Oh, while you're thinking about it, we're going to swap him for the other guy you want so you can't have either.

So, will you be paying cash or check?