Scalpers continue to rake in profit

Ticket scalpers are a staple at any major event. But the chances for lucrative deals at the world's biggest sporting event are high, with one ticket for the opening ceremony sold for US$20,000.

Beijing authorities had declared scalping to be illegal and offenders can face up to 15 days in detention. Dozens of brazen touts, known locally as "yellow cows", can be seen outside the Olympic Green waving their tickets in full view of police.

We go to find just how much these touts milk their customers, and why they're not afraid of getting caught despite the heavy police presence.

Watch the video report