They may have cut and shifted a few things here, but they kept more than I expected. I was kind of surprised that they kept Touya shooting the prince (though if I remember right in the novel he actually pinned him to the ground and shot his hand).
There were a few points though. For one thing, I'm pretty sure what was said wasn't that Zabune bought the slave girl from a Sandorian slave trader, but rather he bought the collar (and a fair number of extras) from the trader, implying the girl was just one of many local girls he'd had fun with. As for cuts...