Foster is nearly as old as me ..... well, sort of, and he's had problems with his fingers. I wouldnt touch him now. Going to Man City and playing three games a season is one thing, a 46 game Championship season is something completely different.
As for Johnstone, I'd be very surprised and really pleased if we got 20 million for him. Cant see it myself. If we get anything above 10 million it's good business for a keeper who has only a year on his contract.