Martina,
just for info I have bought most of my gear over the years (at least 30 times) from this forum (used) and I have never been disappointed. Pentaxians really look after their gear.
I was always fortunate to have friends or colleagues traveling to Europe or USA that chucked the cameras or lenses in their bags and brought it in with no fuss. I have also bought from B&H and Amazon (used or refurbished) and then there's import duties but it also arrives intact and of good quality. Hope this helps some