That's called "scalping" and it's illegal.
You wanna know whats fucking halarious in Edmonton (Canada), people were getting in shit because they would get to ticketmaster early buy some tickets and sell them on ebay just before the show to local edmonton people, meet up with them get paid and leave right.
Thats illigal and considered scalping because our law states that its legal to sell the tickets you bought but you cannot sell them for more then you paid for them anyway what people started to do was include a mcdonalds coupon or meal and then they would charge the legal amount for the ticket and like $1000 bucks for the Mcdonalds meal that goes with it....technically still scalping but apparently not illegal.
But anyway this could be an interesting market but I've already got lots going so you can count me out for competition.