as we can see that opinions vay so much I think it's not much diffrence on when he is sold.
if he is sold now, he will go a price because the buyer himself can still decide what to make of him. With 1m90 he can go any way.
train outsides for a good guard
train JS and IS for a good SF
train insides + JS for a good F or just insides for C
If he gets sold later, the option will at least partly be made, and an other audience is attracted, but it's not sure he will go for more money even if he is better...
I'd say it's a gamble that can go either way. The bad part is you don't have a clear way to go to make the most money, the good part is that you probably can't make a big mistake...
They are not your friends; they dispise you. I am the only one you can count on. Trust me.