I had a C64. I meant how the copy itself performed. :)
Like: For $595 you get what nobody else can give you (and it's only) for twice the price.
It's also possible that the ambiguity was intentional.. Ad copy is an art and it did compel me to read all of it to unpack the meaning. Though thinking this through I would assume that everyone interested in computers at the time would know what the prices of other products were so the $595 would immediately be understood as very cheap in comparison