Samsung held an exclusive sale of a limited number of Galaxy Z Flip phones in its Digital Plaza stores in Seoul, prior to the official release of the phone (in Korea, pre-orders are supposed to start shipping tomorrow). Only 900 units were available, but they were all sold before the end of the day, despite the relatively high price of KRW 1.65 million. Sales started at 10:30 local time. The Mirror Purple units were the first to run out, around 16:00. The other color option that was available, Mirror Black, lasted until around 18:00, clearly showing which is the hotter of the two...
Source: https://www.gsmarena.com/samsung_sells_a_limited_number_of_galaxy_z_flip_at_samsung_digital_plaza_ahead_of_official_launch-news-41528.php