Lets hope that Wenger expressing an interest sparks a bidding war, if its inevitable that hes going then lets get as much as we can for him and send him on his way with our best wishes. Is Ty irreplaceable? Not at all MM will have some targets in mind before hes allowed to go especially if Town are still going well.
I think Ty would be better off staying till the end of the season, there is no reason his value would diminish between now and then. Also I think he owes it to MM for taking a punt in him in the first place when he plucked him from non league obscurity. Ty strikes me of having a conscience and moral values.!