Still, scalping exists, and tickets for most events, including Broadway tickets could be sourced through scalpers. Unfortunately, tickets purchased at TKTS booths are just available for that day from the show and you can't purchase tickets prematurely. http://oldwiki.Bedlamtheatre.co.uk/index.php/How_To_Get_Broadway_Tickets_For_Tonight_%E2%80%93_Quick_And_Easy