Staff members listen to collectors' offers on the phone during the autumn sale of China Guardian Auctions Co., in Hong Kong Sunday, Oct. 7, 2012. Chinese and international auction houses are encroaching on each other's territory in Hong Kong and Beijing for the first time this autumn sale season as they step up the battle for the Asian art market. (AP Photo/Vincent Yu)

Associated Press
Staff members listen to collectors' offers on the phone during the autumn sale of China Guardian Auctions Co., in Hong Kong Sunday, Oct. 7, 2012. Chinese and international auction houses are encroaching on each other's territory in Hong Kong and Beijing for the first time this autumn sale season as they step up the battle for the Asian art market. (AP Photo/Vincent Yu)
Staff members listen to collectors' offers on the phone during the autumn sale of China Guardian Auctions Co., in Hong Kong Sunday, Oct. 7, 2012. Chinese and international auction houses are encroaching on each other's territory in Hong Kong and Beijing for the first time this autumn sale season as they step up the battle for the Asian art market. (AP Photo/Vincent Yu)
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