Sorry to hear. Yeah they are usually. I was snubbed at the Linn store.
If you haven't already there is also Fortune Town especially and Amarin Plaza that have some great stores. A few Piyanas stores, TS Audio make fantastic and cheap hand built valve gear and speakers.I was pretty impressed with their gear even around the $400 AUD new.
There is also Grand AV that have some very high end
Mungkong have a forum with used gear and a store in Amarin from memory
Facebook marketplace is good for used gear.
I believe the Bangkok HiFi show is coming up soon too that is well worth a look. They had some other locally made gear that was great on display when I went.
Saw some vintage gear at night markets from time to time but it was a fair way out and pretty expensive