In the US, ticket scalping is the practice of buying and reselling event tickets by private citizens, rather than by the sponsoring venue or organization, usually at a much higher price than their face value. Laws about ticket scalping vary by state, and there is no federal law that prohibits the practice.
Is it illegal to resell a ticket?
In New South Wales it is against the law to resell tickets above the original value plus 10 per cent. The NSW laws also include a protection for consumers preventing tickets that have been resold at or below face value plus 10 per cent being cancelled by event organisers.
Is it legal to resell Ticketmaster tickets?
Ticketmaster doesn't allow resell on their site for all events. However, you can sell those tickets on StubHub or any other marketplace.