We're in Frankfurt right now on our way back from Cairo. Flew in today, stopped at the Condor desk to get boarding passes for tomorrow. Had read somewhere that they sell the Business Class out 24 hours before the flight so I thought, what the heck, I'll ask. Two seats available. We had previously paid $550 for this FRA - SEA flight in premium economy. $220 to upgrade to Business Class!
Purchased and I'm pretty excited - should make tomorrow's flight much nicer. A good deal, it seems to me:)