Why is anyone surprised? If I was JET, I'd want to move forward with a career that stalled at Ipswich having promised so much
If we get a handsome return on him, then happy days - we can use that money for other players, etc.
Read "Why England Lose" about how Lyons achieved success - they used "moneyball" principles: get in a player who is undervalued, bring him on, and sell him as soon as anyone offers you more than you think he's worth. Use the money to buy more players, etc. etc.