Replying to Last minute concert ticket buying?

Here's the deal

my friend and i wanna go to eminem & jay-z in comerica park thursday night

ticket prices are outrageous right now and he doesn't wanna pay more then 100 dollars for a field level ticket (we only want field level or first level seating basically)

i made a thread about this awhile ago and someone said if you wait till last minute, the ticket prices could get really low

has this ever happened to anyone?