It seems to me that Craigslist must have made some monumental misjudgment when they didn't expand internationally. I for one, for example, only know of them from hearsay as some kind of obscure US-only classified ads site.
Also a large portion of craigslist here was just the personals section - once that was shut down there is basically no good reason to use it anymore, as it simply doesn't have the network effect / critical mass of users to sustain itself. The remaining users all seem to be work-related scams of some kind (probably automated) and drug dealers (probably cops).