Thanks to everyone who have posted so far. Here are a couple of updates:
Macallan 12 spotted for $450 at a neighborhood (possibly Indo?) supermarket at the corner of Tong Shui and Wharf in North Point. Box looked legit but didn't see the bottle/hologram.
Also saw a "limited edition" (i.e. fancy, decorated box) Macallan 12 at City Garden Wellcome for $538.
As for how much whisky I drink, it is sadly not as much as I used to. It is hard liquor after all and as I get older I seem to actually be able to feel my body being less tolerant. But it's really nice when you find a good single malt that you like where even a small amount creates a lot of pleasure. I love me a good Islay malt and my benchmark is Laphroaig 10 for USD$39.99 at Costco in San Francisco. Unfortunately the cheapest Laphroaig I've seen here is over $600 (damn).
Searching for used video game stuff I stumbled upon people selling whisky on Carousell, with some interesting-looking prices as well. May be worth a try with high-feedback sellers. Who will take one for the team?
https://hk.carousell.com/search/prod...cotch%20whisky