They weren't costing down that much in 1988 and 1989 when this deck was released.
That was actually right in the beginning of the pinnacle 'Elevated Standard' years of 1987 to 1993 for Sony.
Sure they had entry level decks donned with the 'ES' badge, but this wasn't one of those lower end models.
And this deck sold for around 600 clams - only to be discounted by liquidators, years later.