If you travel with EASYJET and have hand luggage, and when booking online take off the cost for extra hold luggage (�6 each way), if you then decided you wanted to take hold luggage can you pay for this at check-in? How much does it cost?
You definitley can but knobby has the right idea, book the extra baggage on-line right up until just before you check as it is half the price for on-line booking!