HAS one of the territory's best-known soccer players fallen on hard times since last summer, when he left Eastern, the league champion team? Patrons of the Uhlsport sports shop opposite Times Square in Causeway Bay were surprised to find shaggy-haired Lee Kin-wo sitting behind the cash register, and telling the assistants where to locate sale items. Lee was among the players to leave Eastern last spring. He was offered terms with South China, although his presence in the shop might indicate that he has had to take a drop in salary to play for the territory's best-supported team. Lee might want to score points with the management by pointing out that the shop's plastic bags mis-spell the address.