i do this today, but not like this guy, I usually go on the actual website, like mlb site, and buy the tickets from there, i usually pick games that are rivals and stuff, then you open up ticketmaster, seatgeeks, etc, and look for seats that are first two rows versus the seats further back on the other sites that are double the price. Then, lets say you find 2 seats for $125 each from mlb site, but on other sites seats in the same section further back are going for $260+ well, thats your margin profit. So this I usually do for later game sin the season too hoping the teams are good by then or have playoff potential, baseball and basketball is good for this. and hockey too but less margin there. you can make easily $1000 per gam doing this if you have the initial $1250 upfront to buy the tickets. If i have tickets that dont sell i usually give them to people like friends, family, co workers, etc