This age argument is really doing my head in. There seems to be a common view on bluemoon that once a player turns 30 it's curtains, they lose all pace, fitness and ability. I'm pretty sure the Bayern team that won the treble played two wingers, Robben and Ribery, who were both older than 30 and I've just seen a well over 30 Ronaldo single handedly win the champions league. Sanchez is far from finished and as with all top players can when they lose that extra yard of pace they make up for it with intelligence and experience. People seem to be underestimating the benefits of signing order players that have experience, we have plenty of young, raw talent in our forward line.
I even remember people on here writing off David when Pep came in due to him being old and past his best, and look how that turned out.