Department Store with the Highest Average Transaction Value per Customer (Estimated)

Apgujeong Galleria East
Followed by Hyundai Main Branch
This is just my guess lol
At Hyundai Main or Apgujeong Galleria, even famous celebrities, business leaders, and athletes that everyone in the country knows actually visit (on the level of IU, Yoo Jae-suk, BTS, or Lee Jung-hoo).
I have actually seen them in person.
Since many residents of Apgujeong Hyundai who used to spend a lot of money have moved out after leasing their homes, Hyundai Main is slightly below Galleria, but even so, the Jasmine Card holders can't even compete here. lol