I could send five cards to start with, and that's what I did. My fifth card went to Michelle in Richmond, Maine, USA. She likes animals and nature, so I picked this card, which she really liked - apparently she loves 'pictures looking through one thing to another'. :-)
This card was sent on October 5th, travelled 5,442 kilometers - by far the longest distance of the five - and it took a really long time to arrive. I have sent a lot of mail to the US over the years and it's rare for a postcard to take this long. But better late than never. :-) It was registered as received on October 19th, after a fortnight of travel.