85 sounds like a good guess to me! Will be happy if I can achieve that :).
In the last video, I did 5x5 with 50kg, and will increase that to 52.5 on my next workout. Since I haven't really focused on low rep shoulder presses before (mostly done 3x10 dumbbell presses) I expect to be able to increase it quite steadily until I plateau.
Nothing would make me happier than giving away 300USD+ worth of rewards to the winner at the end :D