You only sell players that are in the first team for ABOVE valuation. He's played for Pardew and Carver, and basically only a small handful of players actually progressed here, the rest stall, leave, or become shitty versions of themselves.
I'd only sell Sissoko for 25M and even that, I'm more so thinking we shouldn't even entertain offers unless its silly money.
Stopping Sissoko meant stopping us before, but now, hopefully with the addition of Wijnaldum, the return of Aarons, and a real game plan with tactics we will no longer be a 1 trick pony team.