The Lisa served admirably as the conceptual prototype for the Macintosh. At $10K, it was crazy expensive, but it demonstrated the usefulness of its concepts and introduced them into many a workplace, including the aerospace engineering outfit I was working for at the time.
I worked and played with that Lisa a fair amount, though not as much as the guys whose department paid for it :-) ,P> Ultimately it yielded to the Mac, after selling around 100,000 units. But it had set the stage very well.
> Did it do as well as the NeXT?
Better -- the NeXT computer sold about 50,000 units.
As I recall, if I'm recalling correctly, Apple manufactured 100,000 Lisa units but the majority wound up in an undisclosed landfill in Nevada and Apple took a major loss on those unsold units.