Originally Posted by
Adebisi2000
...
"Sorry, you cannot purchase online excess baggage, for any of the following reasons:
- You are not within 72 hours (three days) of departure.
- You are within 90 minutes of departure.
..."
So, basically, you can buy excess baggage only between -72h and -1h30

.
Next time I move house (and change country), I'd better use a different carrier ... I can't wait until -72h to discover if I can/can't have xs baggage.
Thank you
Adebisi2000 for this info.