Yeah, there's something really off about whole thing IMHO. The bird isn't a B&G, I don't know my hybrids very, but I think she is one. She is totally a gorgeous girl. Urg! These kinds of ads are why I hate craigslist and kijiji. The cage is absolutely pitiful
I hate seeing any creature kept such conditions. I hope she'll find a soft place to land but I would also caution anyone responding to this ad too. As I would be wary of anyone who keep a bird like that. Also a flipper or scam artist comes to mind too.
Edit: looking at the ad again her feathers are in good condition from what I can see, which screams flipper to me. Because there's such a contrast between the condition of her and her cage. I'm betting she was probably decently looked after a some point her life. Also it wouldn't surprise me if some flippers intentionally use bad cages to appeal the bleeding hearts out there. I know these ads get to me. Sometimes people can really suck