That was the very store I bought my first CDs - a bunch of Blue Notes (including one of the Elvin Jones ‘Lighthouse’ CDs, when they were released in two volumes - plus a Hilton Ruiz RCA Novus). Hedging my bets, I also bought an Ollie Nelson vinyl that day too - the store still had a vinyl section, sort of like a Custers last stand baracade of racks.
Those CDs, even with PST, were at the time around half the price they were fetching in Europe. Those days now long gone but during the 1990s it was ‘fill your boots’ time.
That ‘Sam’ store on Yonge was great. When you had finished you could pop next door too to binge at that other store (A&M Sound?).