According to a fellow ftflyer, QR offers upgrade Y->C ex Germany at check-in for €300, at least for MUC-DOH.

Anybody ever done that ? Do you know about the current prices ?

I'm scheduled to fly FRA-DOH-SIN next Friday. My ticket will be a o/w ticket, probably full fare Y and I'm eagerly looking myself to treat me with an upgrade if not too expensive.

Thanks in advance