If they are not of much value and do not have a very long contract, then you could release them (that's only if they are not worth much and not worth getting money for).
Or when you transfer list them, you can got to offer club, which I think you press 'O' for, then you can offer them to clubs for a small amount of money and when they bid keep pushing up the asking price. (This just gets them interested because they think they will get a bargain then you ask for more money).
If that makes any sense...