This is not so much a yes/no AIBU. But im hoping this can still be put here.
A bought 2 tickets for an event. Asked B if she would like to go. B said yes and paid the full amount for one ticket.
A can no longer make it but offered B to find someone else to buy As ticket. B doesn't want to go without A. A still has both tickets and they are likely to go for a higher amount than was originally paid.
What is the fair way to do this?
A sells both tickets and splits the money with B (YABU)
A sells both tickets and gives B back the money she gave. B is not out of pocket (YANBU)