If the keeper does a couple of good saves, then frecs up, everybody remembers the mistake.
A " striker" can miss chance after chance, scores the winner and is a hero.
When Joe Hart left Shrews after playing 50 odd games as a kid, he cost Man City £600,000....however the market has heated up since then, Fraser Forster cost Celtic £2 .5 mill from Newcastle. Jack Butland £4 mill from Brum to Stoke recently, and he was recognised as the best young custodian in England.
Looking at other recent England keepers...Rob Green cost WHU £2 mill from Norwich but by then he had played 200+ games and had been capped by England. Ben Foster cost Man U £1 mill when moving from Stoke as a kid. Scott Carson cost Liverpool £750,000, when he left Leeds.
Of course, a lot of clubs now have money to spunk and say a £250,000 punt on Henry is loose change for many.