How much the watch costs is not an issue, I think. The woman would have been obligated by law and etiquette to return a cheap watch.
That said, I do think Chris Brown should at least have sent back thanks when he got back the watch. Coming to realize his mistake later, he wants to offer her a free show. I don't care for Chris Brown, but I'm willing to give the benefit of whatever doubt there is here that this is not just a cheap publicity stunt but that he really does want to make right whatever he can, however he can. I'm sure he's aware that his reputation has suffered quite a bit over the last few years. Yes, it's certainly possible that he's just after some good publicity, but I don't really know that, so I'm not going to make a judgmental statement about what he's doing now in terms of the watch.