Watching this movie was spoiled by the fact that I watched the American version ("Criminal") first. This version was much better than the American version, but knowing what was going to happen spoiled it a bit for me. While having flaws, the movie was well-crafted and well-acted. One flaw was that why would he tell the buyer who his sister is. At this point in the movie, it is true that he thought he would be selling the real stamps, but why would want someone to know how to trace him. And in fact, if he hadn't said that, what excuse would the buyer had that he would have some influence in convincing him to let his sister do the exchange... Anyway, still an enjoyable movie.