I use a popcorn maker to roast them - it works ok for the small scale I do but probably not the ideal system. I still find it produces fresher better taste than what could be bought already roasted here. Do you know what the cost of sending 2-3 kgs of green beans to New Zealand would be including freight? I fear it could be prohibitive? I have not heard of Caracolillo before but have tried Costa Rica beans before. Can give you an email contact address if the price of shipping is viable.