Games enthusiasts began to line up outside the Convention and Exhibition Centre almost 60 hours before the Asia Game Show was due to open this morning. For the first time the show is being combined with the Hong Kong Online Game Show, where exhibitors release limited-edition items and visitors can try out new games. At the head of the queue were four 16-year-old schoolboys waiting to buy one of the 10 limited-edition Gundam boxed sets worldwide with a price tag of HK$988. Gabriel Chan said the group had arrived at midnight on Monday. 'It is the first time I have come so early to wait,' said Chan, adding that his parents did not mind him sleeping on the streets for three nights. Steven Chan, a shop owner who sells video games in Kwun Tong, was next in line, waiting to buy a boxed set containing several models of giant robots, props and collectible cards. He said one Gundam model had been auctioned in Diamond Hill in September for HK$7,500, and he hoped to place the boxed set in his shop to attract customers if he succeeded in buying it. Soccer fans also camped out overnight for a ball signed by Argentinian and Barcelona star Lionel Messi, which will be given to the first buyer of the Sony PlayStation game Winning Eleven 2010. The second purchaser will receive a soccer shirt signed by Spain and Liverpool striker Fernando Torres. Joseph Yeung, 17, had been standing in line with two friends since 1am yesterday. Asked whether he had ever slept on the streets, he said: 'No. People who walk past judge us. It is not very comfortable without a bed in cold weather.' Organisers are expecting much better sales than last year, partly because of the recovering economy. Sony Computer Entertainment Hong Kong, one of the main exhibitors, is also targeting mainland visitors who are likely to be big spenders because of the exchange rate. James Akio Hong, general manager of the company's marketing division, said there was an express queue for mainland visitors. The company has arranged bus services for 112 registered mainland visitors between Shenzhen and the convention centre. He expected mainland visitors who could not buy the games and consoles across the border to contribute to 30 per cent of total sales.