nope, S. Roberto is Barcelona player for many years (since 2009), while Joshua Kimmich joined Bayern last year. I would compare him more to Denis Suarez.
As for this "they have no reason to sell", I already gave a reason in my post, beside when this "no reason to sell" stopped a club like Barcelona from trying? Marquinhos any one?
1-S.Roberto almost get sold in Jan 2015 but Lucho vetoed the deal.Spending many years in the club is a nice thing to sell to the fans but it never stopped clubs from selling players they don't need.And never stopped clubs from keeping their own player
2-Their new coach is Ancelotti,the guy who admits that he works with whatever the club gives him.why he would ever have different agenda for one of the top young versatile player in the world?This reason is really weak as it gets
3-Right price for them is never gonna be the right price for us.that is key
4-I said it 100 of times,there is no proof we ever went for Marquinhos since PSG shut us down in June 2014.And even if true,it didn't end up well for us.
So why you should suggest doing it again?