There's an article on Yahoo's homepage about how much some singers/bands make for private appearances (in light of the appearances paid for by Gadhafi). Guns N' Roses is mentioned for getting $1 million for the Russian private show they played last year. It's interesting to see how much some of the singers and bands have gotten paid to play even just one song for some of these rich people. But hell, if I won the Powerball, i'd hire GNR for the celebration if i could!
here's a link to the same article on hollywood reporter:
www.hollywoodreporter.com/news/shocking-amounts-money-a-singer-163861