I went there as well, and found the same, but also found the prices somewhat high for me. Otherwise I would have loved to get something from NewJeans or Aespa. But that said, I also admit that I didn't look past the first few I found, thanks to them being pricey (again, for me. I do think they are reasonably priced). But I did buy two books, which were quite cheap. The place is very much worth a visit.
And if you are looking for books, there are used books for dirt cheap at Aladdin which are just as good as new, which is definitely worth a visit.
(replying from my gmail id because I found out only this one is apparently subscribed to #d-discuss, smh)
Best,
weepingclown