Well we were due a fee for Gosling, up to 4-5 million pounds which we didn't get because we didn't put the contract in writing for him. So yes we would be eligible for a fee. I doubt it would be as high as 5 million, it may be a couple of million pounds though and may be enough to put a potential suitor off him. (I think Ince's fee was around 6-8 million for example).
I doubt Leeds would have a sell on fee, as much like ourselves they will be awarded a fee as compensation and it will not be negotiated.
In the end I really hope Martinez can get this lad to stay. I think it would be a big mistake losing young players like him, as it sends the wrong message. I'd almost be happy to move Baines forward to Left midfield to accommodate him. I really like he could be England's next left back.