He's our player, we don't need to sell him.
-Birmingham have a good deal by taking him on loan, if he gets injured or turns crap they can severe ties.
-Joe has nothing to lose either, at worse case he'll be sat on our bench earning a good salary, at best case he'll return to us as first team keeper in x amount of years on a much better salary. If Birmingham decide they want a permanent keeper on contract, i'm sure Joe will have plenty of offers from other clubs.
-We have nothing to lose, keep shay as long as we can and have an up-and-coming english goalkeeper to replace, one that has gained alot of experience over his loaned out years.