bwaybarbie2, are you selling these tickets because you can't attend? You should always try to call Telecharge (or Ticketmaster or whoever) and try to exchange or get a refund if you can no longer attend. They'll usually do it.
I've already seen the show. They are originally my grandparents tickets, but they were unable to make it to NYC, so they said to sell any tickets to shows that I have already seen.