The cost is Just a code or a different superstar account you can bid in her Guestbook or In fashion-mag's But most people will be bidding in her Guestbook For some off reason but Anyways i believe thats a pretty reasonibal price since she almost has 2000 starpoints and she has 868$ heres proof and she has 80 days of superstar left i will put the proof at the end of this post so here is the proof thanks and remember bid in her guestbook or Fashion-mag's :) and the cost again is a code or a different superstar account:
proof-