Now I'm just going to preface this by saying this method is NOT for everyone! But if you are open to trying something new, then I'm here to help. I've been flipping concert tickets for a few months now and can honestly say that I've made like over $2k in profit for pretty minimal work. I have a full-time job at a great company, but I am always looking for ways to make some extra money.
So, the concept here is pretty simple: BUY LOW, SELL HIGH. That obviously can be applied to a lot of different things, but it's imperative to understand when flipping tickets. You want to be able to get tickets on presale for face value and then flip them for above face value when certain "hot" events sell out (ex: Drake, Bieber, Adele, etc). There are plenty of resources available to find out what tickets to buy, what venues are gonna sell out etc.
Now this is the part where a lot of people might lose interest: you are going to need a new Credit Card (AMEX or Citi card) to really make money. You don't have to get a new CC, but to get the good seats before anyone else does, you're going to need to get a new CC. Take a look at the link below. Click "Onsale Times" and you'll see that there is an AMEX presale before tickets go on sale to general public.
You can also see what the tickets will be priced at by clicking "Price Range" ($59.95 to $149.95 for this concert). I use a lot of my own judgement/research to decide what concerts to buy tickets to etc. I only have an AMEX, so I use the two sites below to find out about when certain presales are happening.
Presale.Codes Means Early Tickets For Lots of Great Events
I know there aren't a lot of presales listed at the moment, but be patient. There will be some good summer concerts and events you can make money on. I will periodically post updates in the thread when I see a concert that will be a good moneymaker.
I always buy e-tickets that I can download instantly. I download the PDFs from Ticketmaster and then head to StubHub, create my listing, and upload the PDFs. That way, when someone buys the tickets, they can instantly download the tickets and you save money by not paying for them to be shipped and the hassle of re-shipping them (although StubHub covers the shipping if you do choose to go that route).
You'll notice that there are both ticket fees when buying on Ticketmaster and fees when selling on StubHub. Keep this in mind when trying to determine your profit margin and what you're aiming for. I bought and sold pairs of tickets to the Drake & Future concert at several different venues (Madison Square Garden, TD Garden, Staples Center etc) and made $200-$400 profit on each pair. Another tip: document everything. I have a spreadsheet with how much I paid, how much I sold them for, date purchased, date sold, venue, etc. That way you can break it down and see how much money you're making per month etc.
Please feel free to ask any questions you may have. I threw this together pretty quickly, because I learned a lot of it on my own doing my research, so I suggest you do the same if you're really interested.