are u only looking into sports tickets
concerts are good, freind on mine dose it all the time, however he only does them on the big concerts, ie...brittney spear, dave matthews band, and stuff like that, he makes good coin on it, its a grind however and have to have a bank roll to buy like 30-40 tickets up front....good return though, and have to pick the big headliners for the concerts....his favorite is dave matthews.....they have a loyal fan base who spend all kinds of money to go to their concerts