Thats because chatswood only has Coles, and Tassal didn't go for the Coles fresh salmon market.
However there is still plenty of Tassal smoked in the fridge section at Coles.
Also there is no "de costi" store in chatswood, You might be talking about "Costi" seafood in chatswood chase, which has nothing to do with the "De Costi" brand.
TGR Price at posting:
$3.95 Sentiment: Buy Disclosure: Held