- Costco. Costco's got some pretty good deals, especially under their Kirkland brand.
- Trader Joe's. Trader Joe's also has their own house brand, but it's the same Macallan for a better price.
- Green Jug, located in the Valley. They're originally a wine store, but they do have a decent and unique Scotch selection.
There's also one great store in the Bay Area I used to go to...but I'm totally blanking on it.