I've got upcoming AMS-MUC and PRG-FRA for 79 each, FRA-AMS being 99 now from I believe before 79. These are confirmed upgrades, so decent-ish prices. Annoyingly, the one that I do want to upgrade, MUC-VIE on OS metal, can't be, neither on Austrian nor Lufthansa web.
MyOffer starting at 75USD for the eligible sectors.