I don't mind you questioning the price, you've got right to do it as prices quoted are extravagant. Though I don't think anyone will pay them. 100-120 mil. should do it.
But if people who's football is much better than mine and yours, and not only from City but many other top clubs, think is ready enough and good investment for 10 years to come, why would you bother questioning them. I'm not sure how good he is, haven't watched him at all but in our games, but the boy scored in Champions League, against big boys just as he did in France. Everybody is crazy about him, everybody thinks he's one of the greatest talents in recent times, he's scoring goals, put the price beside and think isn't he worth a risk over the player who'd give us 2-3 years of service at top. we'll have enough to worry bout replacing Aguero who is similar age as Sanchez, imagine both of them. Not that I'm saying we shouldn't take Sanchez if Mbappe is not available or if we could get both but everything points that Mbappe is worth of the risk. we were throwing millions on all kind of average players, younger and older, so why not have a risk at a player that lot of people find as the next huge one. If we failed, it own't be the first or last time, but if we hit it, he might be the one to carry us to number of trophies in next decade.