I'd love to go see Gaga live but the tickets for the pit are something like 100 euros and Idon't have the money for that right now... Seats are much cheaper but there's no way <i'm sitting during a concert.
I remember back when Madonna was charging like $300 dls for an entry to a concert on one of her last tours and people were complaining, she answered back saying she's worth it and that people spend that money on random shit all the time and why won't we all spend that on a great night and a great show.
at the time, I read it and said "mmhh.. no Madonna, disagree".
but then I watched the "sweet and sticky" tour videos on Youtube and holy shit... what a show, the dancers, the virbations, the music. Absolutely worth it. Besides being like 55, those tours were probably the last time people were going to see a fit and active madonna on stage
to summarize, if you have the chance to see a pop star of that caliber live, think twice before dismissing the idea based on pure financial reasons.